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Erschienen in: Infectious Diseases and Therapy 3/2020

Open Access 27.05.2020 | COVID-19 | Review

Treatments Administered to the First 9152 Reported Cases of COVID-19: A Systematic Review

verfasst von: David C. Fajgenbaum, Johnson S. Khor, Alexander Gorzewski, Mark-Avery Tamakloe, Victoria Powers, Joseph J. Kakkis, Mileva Repasky, Anne Taylor, Alexander Beschloss, Laura Hernandez-Miyares, Beatrice Go, Vivek Nimgaonkar, Madison S. McCarthy, Casey J. Kim, Ruth-Anne Langan Pai, Sarah Frankl, Philip Angelides, Joanna Jiang, Rozena Rasheed, Erin Napier, Duncan Mackay, Sheila K. Pierson

Erschienen in: Infectious Diseases and Therapy | Ausgabe 3/2020

Abstract

The emergence of SARS-CoV-2/2019 novel coronavirus (COVID-19) has created a global pandemic with no approved treatments or vaccines. Many treatments have already been administered to COVID-19 patients but have not been systematically evaluated. We performed a systematic literature review to identify all treatments reported to be administered to COVID-19 patients and to assess time to clinically meaningful response for treatments with sufficient data. We searched PubMed, BioRxiv, MedRxiv, and ChinaXiv for articles reporting treatments for COVID-19 patients published between 1 December 2019 and 27 March 2020. Data were analyzed descriptively. Of the 2706 articles identified, 155 studies met the inclusion criteria, comprising 9152 patients. The cohort was 45.4% female and 98.3% hospitalized, and mean (SD) age was 44.4 years (SD 21.0). The most frequently administered drug classes were antivirals, antibiotics, and corticosteroids, and of the 115 reported drugs, the most frequently administered was combination lopinavir/ritonavir, which was associated with a time to clinically meaningful response (complete symptom resolution or hospital discharge) of 11.7 (1.09) days. There were insufficient data to compare across treatments. Many treatments have been administered to the first 9152 reported cases of COVID-19. These data serve as the basis for an open-source registry of all reported treatments given to COVID-19 patients at www.​CDCN.​org/​CORONA. Further work is needed to prioritize drugs for investigation in well-controlled clinical trials and treatment protocols.
Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s40121-020-00303-8) contains supplementary material, which is available to authorized users.
David C. Fajgenbaum and Johnson S. Khor contributed equally to this study.

Digital Features

To view digital features for this article go to https://​doi.​org/​10.​6084/​m9.​figshare.​12287996.
Key Summary Points
Why carry out this study?
Data on drugs that have been used to treat COVID-19 worldwide are currently spread throughout disparate publications.
We performed a systematic review of the literature to identify drugs that have been tried in COVID-19 patients and to explore clinically meaningful response time.
What was learned from the study?
We identified 115 uniquely referenced treatments administered to COVID-19 patients. Antivirals were the most frequently administered class; combination lopinavir/ritonavir was the most frequently used treatment.
This study presents the latest status of off-label and experimental treatments for COVID-19. Studies such as this are important for all diseases, especially those that do not currently have definitive evidence from randomized controlled trials or approved therapies.

Introduction

SARS-CoV-2 as well as its related disease, 2019 novel coronavirus (COVID-19), is a global pandemic. Over 2,200,000 cases and 150,000 deaths have been reported to date worldwide [1]. With an R0 reportedly as high as 2–2.5 and a significant case fatality rate, this virus will continue to have a major impact on the health and well-being of humans worldwide.
COVID-19 patients exhibit a highly heterogeneous clinical course from mild flu-like symptoms to cytokine-storm-driven acute respiratory and multi-organ failure [2]. Physicians worldwide have administered numerous treatments off-label and through clinical trials to treat COVID-19 patients. Although only four months have elapsed since the emergence of COVID-19, many case reports, single-center series, and interventional studies have been published in medical journals as well as pre-publication archives. Some of these treatments have received widespread attention and are currently undergoing randomized controlled trials while others have not. Identifying and inventorying the full range of treatments reported in use is critical for physicians treating COVID-19. Further indicators of effectiveness among those treatments are important for governments, public health organizations, and pharmaceutical companies identifying and prioritizing treatments for well-controlled clinical trials [3]. However, a systematic effort to consolidate and centralize all treatment data is missing.
Our objective was to perform a systematic review to inventory all treatments that have been reported through any study design to be given to COVID-19 patients and to investigate the time to clinically meaningful response among the most frequently administered treatments when sufficient data were available.

Methods

Search Strategy and Selection Criteria

We completed our systematic literature review according to the PRISMA guidelines (Supplementary Table 1) [4]. We searched PubMed, BioRxiv, MedRxiv, and ChinaXiv from December 1, 2019, to March 27, 2020, using the following terms "COVID19" OR "SARS-CoV-2" OR "2019-nCoV". The search was not restricted to publications in any language as translation tools were used for articles not written in English. However, 22 articles could not be accessed, translated, or interpreted by the extractor. Additional references were identified through bibliography searches and review of articles written by study authors. Inclusion criteria included all studies reporting the use of any treatments in COVID-19 patients. Reasons for exclusion include duplication and lack of information on drug treatments administered to COVID-19 patients. No studies were excluded based on participants, treatments, outcomes, study design, or length of study. Both patient- and summary-level studies were included. Given the urgency and importance of this information, articles deposited into online pre-publication archives were also included. The full text of all articles was reviewed by at least one data extractor to determine if the paper met the inclusion and exclusion criteria. A review protocol can be accessed at https://​www.​cdcn.​org/​CORONA.

Data Extraction

All articles meeting inclusion criteria were read and extracted into a centralized spreadsheet. Elements collected included article type, nationality of the authors, patient disease characteristics, treatments administered, and outcomes, when available. A second individual, either holding a medical degree or currently in medical school, performed an independent review of every article and repeated data extraction for every data point. A third individual (JSK) resolved discrepancies between the two extractors. JSK also reviewed the article list and data extractions to remove duplicates and resolve discrepancies related to study inclusion. Data on all patients with drug treatment information available were included to avoid selective reporting bias within studies, but publication bias is likely present in this study. Data extraction fields are listed in Supplementary Table 2.

Data Analysis

Data were analyzed descriptively; no hypothesis tests were performed. Frequency counts and percentages were used to describe categorical data. A weighted mean (standard deviation) was tabulated for continuous data (age, C-reactive protein, time to clinically meaningful response). For summary-level studies that presented continuous data using a median and interquartile range or sample range, sample mean and standard deviation were imputed using the Wan et al. method [5]. Data were combined, and an inverse-variance weighted mean was calculated for age and time to clinically meaningful response (TCMR). TCMR was calculated when available at a per-patient and per-drug level and was defined as the shortest duration between drug start and full symptom resolution (according to author) or hospital discharge. When data on both of these time points were provided, the shortest duration was considered as the TCMR. TCMR cannot be conclusively attributed to a given drug, as drugs were included in the calculation regardless of whether they were used alone, concurrently, or sequentially. For the Kaplan-Meier analysis, patients who were not reported to achieve our definition of clinically meaningful response were censored at time to improvement. Treatments were classified according to the Anatomical Therapeutic Classification (ATC) therapeutic subgroup. Analyses were performed using R (version 3.6.0). This article is based on previously conducted studies and does not contain any studies with human participants or animals performed by any of the authors.

Results

We identified and reviewed 2706 papers (PubMed: 1795, Biorxiv: 298, Medrxiv: 591, Chinaxiv: 22). Of those, 2542 were excluded and 164 underwent complete data extraction by two independent extractors (Fig. 1). The studies varied in category from single case reports in pre-publication archives to published randomized controlled trials. There were 155 studies that satisfied inclusion criteria, with 130/155 (83.9%) reported from China and 25 (16.1%) reported from 13 other countries (Afghanistan, France, Germany, Italy, Japan, Korea, Scotland, Singapore, Spain, Taiwan, UK, the USA, and Vietnam). Nine articles were determined not to meet inclusion criteria when re-reviewed by a second extractor. Of the 155 studies, 117 were published in journals indexed on PubMed; the remainder were published in online archives. Studies reviewed included 87 single-patient retrospective case reports, 65 retrospective case series of between 2 and 1099 cases, and 3 interventional clinical trials. Data for 9152 patients were reported, with data reported from 238 patients on an individual patient-level and 8914 patients on a summary level. These data are available in Supplementary Table 3, and an updated COvid-19 Registry of Off-label & New Agents (CORONA) can be accessed at https://​www.​cdcn.​org/​CORONA.
Patients included in the analysis are predominantly Chinese (98.4%) (Table 1). The weighted mean patient age was 44.4 (SD 21.0) years, and 45.4% of patients were female. The method of positive COVID-19 testing was reported for 91.3% of patients included in the analysis. Nearly all cases were reported to be hospitalized (98.3%), and 1672 (18.3%) were reported to require ventilation. In 2470 (27.0%) cases, the author described the patient(s) as having “severe” disease.
Table 1
Study populations
N
9152
Age (years)
 Mean (SD)
44.4 (21.0)
 Not reported/unknown
281
Sex
 Female
4155 (45.4)
 Male
4993 (54.6)
 Not reported/unknown
4
Country of publication
 China
9002 (98.4)
 France
101 (1.1)
 Singapore
19 (0.2)
 USA
9 (0.1)
 Taiwan
6 (0.1)
 Korea
3 (0.03)
 Germany
2 (0.02)
 Italy
2 (0.02)
 UK
2 (0.02)
 Vietnam
2 (0.02)
 Afghanistan
1 (0.02)
 Japan
1 (0.01)
 Scotland
1 (0.01)
 Spain
1 (0.01)
COVID-19 testing
 Testing method reported
8357 (91.3)
 Testing method not reported
795 (8.6)
Hospitalized
 Yes
8997 (98.3)
 No
143 (1.6)
 Not reported
12 (.1)
ICU stay required
 Yes
1017 (11.1)
 No
4112 (44.9)
 Not reported
4023 (44.0.)
Ventilator required
 Yes
1672 (18.3)
 No
5564 (60.8)
 Not reported
1916 (20.9)
Author-defined severity
 Severe
2470 (27.0)
 Not severe
5031 (55.0)
 Not reported
1651 (18.0)
Data are mean (SD) or n/N (%), unless otherwise specified
All patients included in this analysis received at least one treatment intended to treat COVID-19 (Table 1, Supplementary Table 3). Fourteen therapeutic categories comprised a total of 115 reported treatments as well as many non-descript treatments (e.g., “antibiotics not otherwise specified”). Treatments described were administered alone, concurrently, or sequentially with others. Given the nature of the reports, we did not differentiate concurrent or sequential treatment regimens. The most frequently administered classifications of treatments were antivirals (N = 6547, 71.5%), antibiotics (N = 4263, 46.6%), and corticosteroids (N = 2392, 26.1%) (Fig. 2a). The most frequently administered treatment given to all patients was combination lopinavir/ritonavir (N = 2000, 21.9%), followed by interferon α/β (N = 1767, 19.3%) and immunoglobulins (N = 1049, 11.5%) (Fig. 2b, Supplementary Table 4). Of the treatments identified, 100 (86.9%) were administered to < 1% of all patients.
On a per drug basis, response data were sparse and were largely only available on the individual patient level (e.g., case study). Six drugs had patient TCMR data from at least ten patients and at least ten studies. From our review, oseltamivir (ten patients from ten studies) was associated with the longest average TCMR of 19.8 (10.62); however, the sample size was too small to perform statistical comparisons between drugs (Table 2, Fig. 3). Interferon-α/β, which had the highest amount of available response data (N = 107 patients from N = 14 studies), was associated with the shortest weighted TCMR, at mean (SD) 9.9 (2.65). Combination lopinavir/ritonavir included the second most available data (N = 76 patients from N = 15 studies) and was associated with a TCMR of 11.7 (1.09) days. For these two treatments, we restricted to the studies reporting patient-level observations and plotted a Kaplan-Meier curve for time to clinically meaningful response (N = 37 observations for interferon-α/β and N = 34 observations for lopinavir/ritonavir) (Supplementary Fig. 1). For both drugs, median TCMR was < 2 weeks.
Table 2
Time to clinically meaningful response for patients on the seven most frequently used drugs (independently or in combination with other treatments)
Treatment (N)
N studies
N patients
% of patients on drug extractable TCMR
Mean (SD) TCMR
Standard error
Antivirals for systemic use
Lopinavir/ritonavir
 Total
15
76
3.8%
11.7 (1.09)
0.13
  Patient-level
14
25
   
  Summary-level
1
51
   
Umifenovir
 Total
10
13
1.3%
10.9 (7.78)
2.16
  Patient-level
10
13
   
  Summary-level
0
0
   
Oseltamivir
 Total
10
10
1.1%
19.8 (10.62)
3.36
  Patient-level
10
10
   
  Summary-level
0
0
   
Immunostimulants
Interferon-α/β
 Total
14
107
6.1%
9.9 (2.65)
0.26
  Patient-level
12
32
   
  Summary-level
2
75
   
Corticosteroids for systemic use
Methylprednisolone
 Total
12
13
3.1%
14.2 (6.69)
1.86
  Patient-level
12
13
   
  Summary-level
0
0
   
Antibacterials for systemic use
Moxifloxacin
 Total
10
10
1.7%
16.2 (8.6)
2.73
  Patient-level
10
10
   
  Summary-level
0
0
   
We compiled a framework through which several treatments identified in this study may be exerting their effects based on recent insights into COVID-19 pathogenesis (Fig. 4). SARS-CoV-2 binds to the ACE2 receptor on ciliated bronchial epithelial cells to gain entry into these cells for viral replication and dissemination in the airway [6]. Patients with a weakened immune response would be expected to have difficulty controlling COVID-19. Patients with a hyper-immune response experience acute respiratory distress syndrome, septic shock, and multiple organ system failure due to a cytokine storm [7]. Treatments used to date have been proposed to work by inhibiting or modulating these viral or host mechanisms [811].

Discussion

Despite advances in medical care, therapeutics, and infrastructure that have lowered the burden of infectious diseases in recent years, COVID-19 has emerged as a leading cause of death in developed and developing countries. Drug repurposing is the fastest route toward an effective and accessible treatment against COVID-19 before a vaccine is available. A previously unquantified but large number of treatments have been tried off-label or experimentally. To date, only small case reports and single-center studies have reported treatments and data on their potential effectiveness. Some of these publications have received more attention than others leading to further use. It is important to systematically evaluate all previously used treatments to avoid missing effective options. In this systematic review, we identified 115 reported treatments that have been used off-label or experimentally to treat COVID-19; we report an initial assessment of associations with clinically meaningful response. Unsurprisingly, antivirals were the most frequently administered class of treatments. Combination lopinavir/ritonavir and interferon-α/β were the most frequent treatments given to all patients. Given the limited data and the fact that drugs are often given concurrently or sequentially, we did not seek to compare drugs; however, lopinavir/ritonavir and interferon-α/β, which had the most of data, were each associated with average TCMR of < 2 weeks.
These data can be used to prioritize promising treatments for randomized controlled trials. Given that the natural history of COVID-19 is complete resolution in most patients, it is essential that prospective, randomly assigned control groups are used to compare with interventional groups. Furthermore, this study can inform public health organizations, governments, and treating physicians about treatments that have been used and could be considered in future patients, considering the current absence of randomized controlled trial data. Many of the 76 regimens proposed by the World Health Organization for COVID-19 treatment in February 2020, as well as proposed in Chinese governmental guidelines, include treatments found in this study [3, 5]. These drugs were likely often given because they were included in these guidelines. Also, the current case fatality rate of COVID-19 is only interpretable in the context of the medical care and treatments provided to patients to date. Some of the most frequently administered treatments in this study could potentially serve as a starting point for a list of essential medicines for resource-limited regions. Lastly, there are a number of high throughput drug screening efforts underway to identify existing drugs that may have activity against SARS-CoV-2. This study provides information on drugs currently in frequent use.
The treatments that have received the most attention to date include hydroxychloroquine, azithromycin, antivirals used effectively against similar viruses (SARS, MERS, influenza), convalescent plasma, and cytokine storm-directed therapies. In our systematic review, hydroxychloroquine was used 114 times. These patients are from a small case series and two large observational studies, which did not provide enough information to calculate a TCMR. Hydroxychloroquine is believed to increase the endosomal pH needed for virus-cell fusion, interfere with glycosylation of the ACE2 receptor, and modulate the immune response [12]. Data published after the end date of this systematic literature review have revealed notable discrepancies with studies reporting positive outcomes, null results, and potential harmful side effects [1315]. Ritonavir/lopinavir, administered 2000 times in this study, is a protease inhibitor approved for HIV that has demonstrated activity against MERS and SARS [16, 17]. Despite its frequent use, one randomized controlled trial included in this study reported no benefit beyond standard of care. However, the study began administration > 10 days into the disease course, so it is still being studied earlier in disease course [18]. Interferon, the second-most frequently administered agent in this study, is a key anti-viral cytokine produced by the host immune system that can inhibit coronavirus replication and boost the immune response [1921]. It was shown to be effective against SARS-CoV and MERS-CoV [22, 23]. Oseltamivir was also used frequently in this study, though the primary intent was likely to prevent concomitant influenza infection and it does not seem to be a promising treatment approach. Remdesivir, a nucleoside inhibitor not yet approved for any indication, has demonstrated positive in vitro activity; it was used in a small number of cases in this study [12]. Since completion of this systematic review, a larger open-label compassionate use study and a randomized controlled trial have been published; results from another large randomized control trial were also announced but the paper has not undergone peer review. The compassionate use study provided promising data but did not have a control arm [24]. The published randomized controlled trial did not achieve the primary end point of the study [25], but the other randomized controlled trial was reported to have achieved the primary efficacy end point. Umifenovir, approved for influenza in China and Russia, demonstrated a TCMR of 10.9 (7.78) days in this study, though the sample size was low. A study of 67 patients revealed decreased mortality and improved discharge in patients treated with umifenovir [26]. Interestingly, a randomized controlled trial demonstrated greater clinical improvement in favipiravir-treated patients than umifenovir among moderately ill patients [27]. Convalescent plasma was only given in 12 cases, but it was used previously to treat MERS and SARS, and a number of studies are underway [2830].
Similar cytokine storm disorders, such as idiopathic multicentric Castleman disease (iMCD), hemophagocytic lymphohistiocytosis, and chimeric antigen receptor T cell (CART) therapy, are treated by targeting interleukin-6 (IL-6), IL-1, JAK/STAT, NFkB, mTOR, and NFAT. Given the overlap with these cytokine storm disorders, drugs such as siltuximab, anakinra, corticosteroids, and tocilizumab may be effective for controlling the COVID-19-related cytokine storm [7]. Corticosteroids were administered to over one-fourth of all patients (N = 2392) in this study. To date, there have been significant discrepancies between anecdotal reports of corticosteroids helping to improve respiratory function in patients experiencing COVID-19 cytokine storms and recommendations from public health organizations. In fact, public health organizations have recommended against corticosteroids for COVID-19 unless indicated for other conditions [3, 31, 32]. Only 3.1% of all patients who were administered corticosteroids had sufficient data to calculate a TCMR. Further study is needed. Tocilizumab, which blocks the receptor for IL-6 and is effective at abrogating the cytokine storms in iMCD and CART, has also been anecdotally reported to be effective in critically ill patients. Only 22 patients in our study received tocilizumab. Data from randomized controlled trials are urgently needed and should be available soon. The potential benefits for these drugs to control or prevent a hyper-immune response must be weighed against the risk of accelerating disease progression by suppressing the immune response. There are also unanticipated effects when treatments are deployed against novel diseases, such as the high incidence of venous thromboembolism with intravenous immunoglobulin during the 2003 SARS epidemic [3335].
This study provides several other broad insights into COVID-19. We observed a 55%-to-45% male-to-female ratio in these moderate-to-severe COVID-19 cases. A similar pattern was observed for SARS-CoV and MERS-CoV and suspected to be related to protection from sex hormones or differences in the burden of chronic diseases [3643]. The average age of 44.4 years is younger than in many reports. This may be due to younger patients being more likely to survive a severe presentation and thus more likely to be written up as a case report. Pharmaceutical and traditional Chinese treatments were reported in these publications [44, 45]. We found that drugs classified as herbal and traditional medicine were used in 693 patients (7.6%).
This systematic review has several important limitations. In view of the limited number of randomized controlled trials, all papers published in PubMed or archives were included. Therefore, there are case reports and case series with considerably lower data quality standards than randomized controlled trials. From our standpoint, case reports present substantial data quality limitations but they often provide clear information on what treatments were administered and the day of clinically meaningful response, which were the two primary objectives of this study. Furthermore, we felt that data-archived articles about patient characteristics and treatments were important to include and unlikely to change during the peer-review process. Given the current crisis, we chose to enlist a large number of extractors to review the 2706 papers. To improve data quality, a medical doctor or medical student re-reviewed every single extracted case, and any discrepancies were resolved by consensus among extractor #1, extractor #2, an independent reviewer (JSK), senior statistician (SKP), and principal investigator (DCF). This sample set is highly skewed toward hospitalized patients and thus is not likely representative of all COVID-19 patients, and publication bias is likely. Specifically, physicians tend to write up cases where patients have positive outcomes. These papers also tend to be published faster than negative results. Given the proximity to the emergence of this pandemic and the desire for effective solutions, we expect that there is significant publication bias among the articles in this study. The inclusion of not-yet-published studies, such as the studies we included from archives, within a systematic review can help to reduce publication bias, providing a better estimate of effectiveness or association. Furthermore, the primary objective of this study is to inventory and quantify the various treatments used for COVID-19, which is unlikely to go unreported within a given study. For our secondary objective of assessing the TCMR, there is a risk of bias regarding missing data, measurement of outcomes, and selective outcome reporting. We attempted to mitigate these biases by using a standardized definition of TCMR that overcomes heterogeneity of reported outcomes. However, we did not consider concurrent or sequential drug use when associating TCMR. When sufficient data were not available to determine TCMR for a given study, those cases were not included in the TCMR analysis. Only three articles in this study were randomized controlled trials, so risk of biases related to randomization, allocation, and blinding are not applicable in nearly all studies. However, biased participant selection and misclassification of interventions may influence results in nonrandomized studies. Physicians with resources to write articles may have more resources available to treat their patients. Mortality was not assessed as the majority of publications did not report survival and many patients were still hospitalized at the time of publication. Furthermore, we could not control for the natural history or severity of the disease. These data mostly come from treatment of patients in China, where SARS-CoV-2 emerged, and treatment strategies may differ in other regions. Finally, some studies were extracted through translations instead of the full original text. Despite these limitations, this systematic review provides the first broad overview of treatments tried against COVID-19 and insights that can inform practicing public health organizations, clinicians, and clinical trial prioritization.

Conclusion

COVID-19 represents the largest global pandemic and widespread threat to human health in decades. Fortunately, thousands of drugs are available for other indications and can be used off-label immediately. Unfortunately, no central register of all treatments used for COVID-19 exists, so limited data exist on treatment use and activity. Therefore, physicians do not have information on potentially promising treatments and biopharmaceutical companies must make decisions about clinical trials with limited data. We present the first systematic review of treatments used against COVID-19. While the data contained in this study suggest that some drugs may have an effect on treating COVID-19, we strongly encourage clinicians to prescribe treatments based on the results of well-designed randomized controlled trials. This study should serve as an inventory of treatments administered to COVID-19 patients and assist with prioritizing drugs for well-designed randomized controlled trials, having the potential to improve clinical outcomes and reduce the strain on inpatient care in the current pandemic. The importance of these data, heterogeneity of the data, and the time and resources required to perform this study emphasize the urgent need for systematic data collection on off-label and experimental treatments against COVID-19 as well as randomized controlled trials of promising agents. Learning from this experience to inform future pandemics and aid in the discovery of effective treatments for the approximately 7000 diseases without treatments is critically important.

Acknowledgements

We thank Anna Wing, Michael A. Mayer, Megan Fisher, James Germi, Ashwin Amurthur, Eric Rodriguez-Lopez, Bruna Martins, Stephen Bambury, Karen Gunderson, Nick Goodyear, and Cornelia A. Keyser for their contributions to this study. We also thank the physicians, researchers, and patients who contributed their data to help future patients.

Funding

No funding or sponsorship was received for this study or publication of this article. The Rapid Service Fee was funded by the authors. All authors had full access to all the data in the study and had final responsibility for the decision to submit for publication.

Authorship

All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.

Authorship Contributions

Joseph J. Kakkis, Mileva Repasky, Anne Taylor, Alexander Beschloss, Laura Hernandez-Miyares, Beatrice Go, Vivek Nimgaonkar, Madison S. McCarthy, Casey J. Kim, Ruth-Anne Langan Pai, Sarah Frankl, Philip Angelides, Joanna Jiang, Rozena Rasheed, Erin Napier, and Duncan Mackay reviewed and extracted data from articles and reviewed and revised the manuscript. Alexander Gorzewski, Mark-Avery Tamakloe, and Victoria Powers reviewed and extracted data from articles, performed a re-review of every previously extracted articles, and reviewed and revised the manuscript. Johnson S. Khor did the literature search, reviewed and extracted data from articles, performed data quality queries, analyzed data, and reviewed and revised the manuscript. Sheila K. Pierson planned the study, analyzed data, and reviewed and revised the manuscript. David C. Fajgenbaum planned the study and wrote the manuscript.

Disclosures

David C. Fajgenbaum, Johnson S. Khor, Alexander Gorzewski, Mark-Avery Tamakloe, Victoria Powers, Joseph J. Kakkis, Mileva Repasky, Anne Taylor, Alexander Beschloss, Laura Hernandez-Miyares, Beatrice Go, Vivek Nimgaonkar, Madison S. McCarthy, Casey J. Kim, Ruth-Anne Langan Pai, Sarah Frankl, Philip Angelides, Joanna Jiang, Rozena Rasheed, Erin Napier, Duncan Mackay, and Sheila K. Pierson declare no competing interests.

Compliance with Ethical Guidelines

This article is based on previously conducted studies and does not contain any studies with human participants or animals performed by any of the authors.

Open Access

This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://​creativecommons.​org/​licenses/​by-nc/​4.​0/​.
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Electronic supplementary material

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Metadaten
Titel
Treatments Administered to the First 9152 Reported Cases of COVID-19: A Systematic Review
verfasst von
David C. Fajgenbaum
Johnson S. Khor
Alexander Gorzewski
Mark-Avery Tamakloe
Victoria Powers
Joseph J. Kakkis
Mileva Repasky
Anne Taylor
Alexander Beschloss
Laura Hernandez-Miyares
Beatrice Go
Vivek Nimgaonkar
Madison S. McCarthy
Casey J. Kim
Ruth-Anne Langan Pai
Sarah Frankl
Philip Angelides
Joanna Jiang
Rozena Rasheed
Erin Napier
Duncan Mackay
Sheila K. Pierson
Publikationsdatum
27.05.2020
Verlag
Springer Healthcare
Schlagwort
COVID-19
Erschienen in
Infectious Diseases and Therapy / Ausgabe 3/2020
Print ISSN: 2193-8229
Elektronische ISSN: 2193-6382
DOI
https://doi.org/10.1007/s40121-020-00303-8

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