Denosumab Versus Zoledronic Acid in Bone Disease Treatment of Newly Diagnosed Multiple Myeloma: An International, Double-Blind, Randomized Controlled Phase 3 Study—Asian Subgroup Analysis
verfasst von:
Shang-Yi Huang, Sung-Soo Yoon, Kazuyuki Shimizu, Wee Joo Chng, Cheng-Shyong Chang, Raymond Siu-Ming Wong, Seasea Gao, Yang Wang, Steve W. Gordon, Anthony Glennane, Chang-Ki Min
The primary analysis of a global phase 3 study that evaluated the efficacy and safety of denosumab versus zoledronic acid for preventing skeletal-related events (SREs) in adults with newly diagnosed multiple myeloma (MM) indicated that denosumab was noninferior to zoledronic acid for time to first on-study SREs. Here we present a subgroup analysis to evaluate efficacy and safety in Asian patients.
Methods
Patients were randomized 1:1 to receive denosumab 120 mg subcutaneously or zoledronic acid intravenously 4 mg every 4 weeks in a double-blind, double-dummy fashion. All patients received standard-of-care first-line antimyeloma treatment. Each patient received either study drug until an estimated 676 patients experienced at least one on-study SRE and the primary efficacy and safety analyses were completed.
Results
Of 1718 total enrolled patients, 196 Asian patients (denosumab, n = 103; zoledronic acid, n = 93) were included in this subgroup analysis. Fewer patients in the denosumab group developed first on-study SRE compared with the zoledronic acid group; the crude incidence of SREs at the primary analysis cutoff was 38.8% and 50.5%, respectively (HR [95% CI], 0.77 [0.48–1.26]). All 194 patients receiving at least one dose of study drug experienced at least one treatment-emergent AE. The most common AEs reported in either group (denosumab, zoledronic acid) were diarrhea (51.0%, 51.1%), nausea (42.2%, 46.7%), and pyrexia (38.2%, 41.3%). Treatment-emergent renal toxicity occurred in 9/102 (8.8%) and 20/92 (21.7%) patients, respectively. Similar rates of positively adjudicated osteonecrosis of the jaw (7 [6.9%] vs 5 [5.4%]) and treatment-emergent hypocalcemia (19 [18.6%] vs 17 [18.5%]) were reported in the denosumab and zoledronic acid groups, respectively.
Conclusion
Efficacy and safety outcomes from this Asian subgroup were comparable to those of the full study population. Overall, this analysis supports denosumab as an additional treatment option for standard of care for Asian patients with newly diagnosed MM with lytic bone lesions.
Multiple myeloma (MM) is characterized by development of osteolytic lesions, which result from deregulation of normal bone remodeling, causing cancer-induced bone loss and destruction, and increased risk for fracture
The primary analysis of a global phase 3 study (NCT01345019) indicated that denosumab was noninferior to zoledronic acid for time to skeletal-related events (SREs) in patients with newly diagnosed MM with at least one lytic bone lesion; here we present a subgroup analysis of this study to evaluate efficacy and safety in patients from Asian countries
What was learned from this study?
Fewer patients in the denosumab group developed first on-study SRE compared with the zoledronic acid group, results that are consistent with those from the full study
Rates of adverse events, including adjudicated osteonecrosis of the jaw and hypocalcemia, were generally similar between the two treatment groups, renal toxicity was less frequent in the denosumab than in the zoledronic acid group, and overall safety results for the Asian subgroup were in line with those from the full study
Efficacy and safety outcomes for denosumab and zoledronic acid from this Asian subgroup analysis of patients with MM were comparable to those from the primary analysis of the full study population, supporting the use of denosumab as an additional treatment option for the standard of care for Asian patients with newly diagnosed MM with osteolytic lesions
Introduction
Multiple myeloma (MM) is a plasma cell malignancy with approximately 150,000 new cases each year worldwide [1]. In 2018, approximately 56,676 new MM cases were reported in Asia, including 6313 in Japan, 1905 in Korea, 168 in Singapore, and 227 in Malaysia [2‐6]. In 2016, approximately 270 new cases of MM were reported in Hong Kong [7]. From 2011 to 2012, 1023 new cases of MM were reported in Taiwan [8].
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MM is characterized by osteolytic lesions, renal dysfunction, hypercalcemia, anemia, reduced levels of normal immunoglobulins, and increased infection risk [9]. Bone destruction is one of the devastating consequences of MM [10, 11]; the severity of bone destruction correlates with tumor burden and prognosis [12]. The interaction of MM cells with the bone marrow microenvironment deregulates a number of signaling pathways, causing the increased release of factors that potentiate osteoclast formation and activation while inhibiting osteoblast differentiation, leading to greater bone resorption and the suppression of bone formation, respectively [10, 13]. Deregulation of the receptor activator of nuclear factor-kappa B (RANK)/RANK ligand (RANKL) signaling pathway has been primarily linked to the pathogenic increase in osteoclast activity observed in MM [10, 13]. Additional osteoclastogenic factors implicated are the macrophage inflammatory protein 1α (MIP-1α), interleukin-1 (IL-1), IL-3, and IL-6 [10, 13].
A study of patients with MM in China, Hong Kong, Japan, Korea, Singapore, Taiwan, and Thailand revealed that the median age at diagnosis was 62 years [14], which is lower than that reported for the USA (69 years) [15]. Asian patients as a whole are more likely to have advanced disease due to the delay in diagnosis compared to Western countries, with rates of International Staging System (ISS) stages I, II, and III of 19.9%, 36.1%, and 44.0%, respectively. Overall, 60.2% of Asian patients had documented bone lesions, ranging from 28.5% of patients in Thailand to 80.0% of patients in Japan, consistent with rates reported in Western countries [14].
Intravenously administered (IV) bisphosphates, such as zoledronic acid, are considered the standard of care in the management of myeloma bone disease with demonstrated efficacy across tumor types [16‐18]. However, despite the use of IV bisphosphonates, a substantial number of patients with MM develop skeletal complications [19]. In addition, bisphosphonate use is discouraged in patients with renal dysfunction [20], particularly based on the evidence that approximately 60% of patients present with renal dysfunction during the course of the disease [17]. Denosumab is a monoclonal antibody targeting RANKL that has been shown to reduce skeletal-related events (SREs) associated with bone lesions in patients with MM [21‐23].
In patients with solid tumors that had metastasized to bone, denosumab 120 mg subcutaneously administered (SC) every 4 weeks (Q4W) was superior to zoledronic acid in delaying time to SREs [11, 22, 24‐27]. Subsequently, SC denosumab 120 mg Q4W was found to be noninferior to IV zoledronic acid 4 mg Q4W for preventing SREs in a phase 3 study in patients with newly diagnosed MM [21]. Overall survival was similar in both groups (median 49.5 months for denosumab vs not estimable for zoledronic acid; HR 0.90 [95% CI 0.70–1.16], P = 0.41). An exploratory endpoint of this study, progression-free survival (PFS), showed a numerical advantage for denosumab of 10.7 months, compared to zoledronic acid (median 46.1 vs 35.4 months; HR 0.82 [95% CI 0.68–0.99], descriptive P = 0.036) [21]. For Asian patients with MM, there is no direct comparison between these two drugs in the literature. Herein, we assess the consistency of Asian patients receiving denosumab or zoledronic acid with the full study population.
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Methods
Methods for the primary analysis (NCT01345019) [21] of this study were previously described in detail and are briefly summarized here. The Asian subgroup used for this analysis included patients enrolled from the Republic of Korea, Japan, Taiwan, Singapore, Malaysia, and Hong Kong.
Study Design and Participants
This study was a multicenter, randomized, double-blind, active-controlled, phase 3 trial in adults with newly diagnosed MM. Patients were enrolled if they were adults aged at least 18 years with newly diagnosed MM, at least one lytic bone lesion, an Eastern Cooperative Oncology Group (ECOG) score of 0–2, adequate hepatic function (i.e., tests of hepatic function at most two times the upper limit of normal) and adequate renal function (i.e., creatinine clearance of at least 30 mL/min). Key exclusion criteria included having plasma cell leukemia, receipt of more than 30 days of antimyeloma therapy before screening, receipt of more than one previous dose of IV bisphosphonate, and non-healed dental or oral surgery.
Patients were randomized 1:1 to receive SC denosumab 120 mg Q4W plus IV placebo or IV zoledronic acid 4 mg Q4W plus SC placebo (Fig. 1). All patients also received investigators’ choice of first-line antimyeloma therapy, and supplementation with daily vitamin D and calcium was strongly encouraged, unless the patient had documented hypercalcemia. Denosumab dose adjustments were not permitted; zoledronic acid dose adjustments followed approved prescribing guidelines.
Fig. 1
Study design and treatment schema. ASCT autologous stem cell transplant, ISS International Staging System, IV intravenously administered, Q4W every 4 weeks, SC subcutaneously administered, SRE skeletal-related event
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Randomization was blinded and stratified by antimyeloma therapy (novel vs non-novel therapy), intent to undergo autologous stem cell transplantation (yes vs no), ISS stage at diagnosis (I, II, or III), previous SREs (yes vs no), and region (Japan vs other). Blinded treatment continued until approximately 676 patients had at least one on-study SRE (i.e., primary analysis cutoff) and the primary efficacy and safety analysis was completed. Subsequently, open-label denosumab was offered to each patient for up to 2 years.
The study was conducted in accordance with Good Clinical Practice, and study investigators obtained approval from their respective independent ethics committee or institutional review board before study initiation. Written informed consent was provided by patients before any protocol-specific procedures and before the administration of any study drug.
Outcomes and Assessments
The primary endpoint for the primary analysis was whether denosumab was noninferior to zoledronic acid with regards to time to first on-study SRE (noninferiority), defined as the time in days from the date of randomization to the date of the first occurrence of an on-study SRE. If there was no SRE, then time to first on-study SRE was censored at the date the patient completed the treatment phase or the primary analysis cutoff date, whichever was earlier. The effect of study treatment on PFS (time in days from randomization date to the date of first recorded overall disease progression [as determined by study investigators] or to death during the treatment phase from any cause, whichever came first) was assessed as an exploratory endpoint.
In this subgroup analysis, the time to first on-study SRE (tests of noninferiority were not undertaken) and PFS were estimated. The safety and tolerability of denosumab compared with zoledronic acid were assessed. Treatment-emergent adverse events (AEs) were defined as any untoward event occurring from the time of the first dose of study drug through to 30 days after the last dose of study drug or the end-of-treatment phase visit, whichever was longer.
Additional assessments included determining the number of months in the study per treatment group (time period from the first dose of study drug, or randomization date if patients did not receive a treatment dose, to the end of study date or primary data cutoff date, whichever came first) and the cumulative study drug exposure (days from the first dose to the last dose of study drug plus 28 days).
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Statistical Analyses
This Asian subgroup analysis is descriptive in nature. Time to first on-study SRE and PFS were estimated using the Kaplan–Meier method and analyzed using a Cox proportional-hazards model stratified by randomization factors; in addition for PFS, the model was adjusted for baseline covariates (i.e., age, risk per cytogenetic-based prognosis, creatinine clearance [≤ 60 mL/min vs > 60 mL/min], ECOG [≤ 1 vs 2]). Incidence of treatment-emergent AEs and AEs of interest were summarized by treatment group. Time to first on-study SRE and PFS analyses in the Asian subgroup were conducted in the full analysis set, which includes all Asian patients randomized to the study. All safety analyses in the Asian subgroup were performed using randomized Asian patients who received at least one dose of study drug. Analyses were done with SAS version 9.4 and based on the data collected through the primary analysis data cutoff date of July 19, 2016.
Results
Patients
The principal analysis included 1718 patients from 259 centers across 29 countries [21]. Among the entire cohort, a total of 196 (11.4% of the total population) Asian patients were included in the subgroup analysis, including 84 (43%) from Korea, 42 (21%) from Japan, 26 (13%) from Taiwan, 21 (11%) from Singapore, 14 (7%) from Malaysia, and 9 (5%) from Hong Kong. Patient demographics and baseline disease characteristics were generally well balanced between treatment groups in the Asian subgroup, although there was a higher percentage of men in the denosumab group (63.1% vs 46.2% in the zoledronic acid group) and slightly more patients treated with denosumab had an ECOG score of 2 and were diagnosed as ISS stage III at baseline compared to patients treated with zoledronic acid. Additionally, history of SRE prior to study enrollment was higher in patients in the zoledronic acid group compared to those in the denosumab group (Table 1).
Table 1
Baseline demographics and disease characteristics of Asian subgroups
Denosumab 120 mg SC Q4W (N = 103)a
Zoledronic acid 4 mg IV Q4W (N = 93)b
Sex, n (%)
Men
65 (63.1)
43 (46.2)
Women
38 (36.9)
50 (53.8)
Age, median (Q1, Q3)
61.0 (54.0, 69.0)
61.0 (54.0, 68.0)
ECOG performance status at study entry, n (%)
0
33 (32.0)
24 (25.8)
1
45 (43.7)
52 (55.9)
2
25 (24.3)
17 (18.3)
Multiple myeloma ISS stage at diagnosis, n (%)
I
25 (24.3)
31 (33.3)
II
35 (34.0)
36 (38.7)
III
42 (40.8)
26 (28.0)
Not available
1 (1.0)
0
History of SREs, n (%)
Any SRE
64 (62.1)
70 (75.3)
Pathological fracture
57 (55.3)
60 (64.5)
Spinal cord compression
14 (13.6)
16 (17.2)
Radiation therapy to bone
6 (5.8)
8 (8.6)
Surgery to bone
9 (8.7)
22 (23.7)
Prior radiotherapy to soft tissue/mass for multiple myeloma, n (%)
2 (1.9)
6 (6.5)
Prior oral bisphosphonate use, n (%)
1 (1.0)
4 (4.3)
Class of the first-line therapy, n (%)
PI only
37 (35.9)
42 (45.2)
IMiD only
26 (25.2)
31 (33.3)
PI + IMiD
32 (31.1)
17 (18.3)
Other
7 (6.8)
3 (3.2)
Cytogenetics risk group, n (%)
Standard risk
77 (74.8)
71 (76.3)
High risk
10 (9.7)
9 (9.7)
Unknown
16 (15.5)
13 (14.0)
ECOG Eastern Cooperative Oncology Group, IMiD immunomodulatory drug, ISS International Staging System, IV intravenously, PI proteasome inhibitor, Q4W every 4 weeks, SC subcutaneously, SRE skeletal-related event
aOf the 103 patients randomized to denosumab, 36 (35%) were from Korea, 24 (23%) were from Japan, 15 (15%) were from Taiwan, 15 (15%) were from Singapore, 8 (8%) were from Malaysia, and 5 (5%) were from Hong Kong
bOf the 93 patients randomized to zoledronic acid, 48 (52%) were from Korea, 18 (19%) were from Japan, 11 (12%) were from Taiwan, 6 (6%) were from Singapore, 6 (6%) were from Malaysia, and 4 (4%) were from Hong Kong
The median (interquartile range [IQR]) number of months in the study was slightly shorter for patients in the denosumab group (17.5 [9.8–30.2] months) than those in the zoledronic acid group (20.2 [13.1–29.2] months). Median (IQR) cumulative drug exposure was accordingly slightly lower for patients treated with denosumab (15.9 [8.5–24.0] months) than zoledronic acid (17.4 [9.1–26.7] months).
Outcomes
Time to First On-Study SRE
Fewer Asian patients in the denosumab group developed a first on-study SRE compared with the zoledronic acid group (Fig. 2). The crude incidence of SREs was 38.8% in the denosumab group compared with 50.5% in the zoledronic acid group (hazard ratio [95% CI], 0.77 [0.48–1.26]). The probability (95% CI) of patients with SRE at each time point evaluated was numerically lower for patients in the denosumab group versus those in the zoledronic acid group: at the 25th week, 29.9% (21.8–40.2) versus 44.6% (35.0–55.4), respectively; at the 49th week, 36.8% (27.9–47.4) versus 48.7% (38.7–59.7), respectively; at the 109th week, 43.1% (33.3–54.3) versus 52.8% (42.1–64.3), respectively.
Fig. 2
Time to first on-study SRE for Asian subgroup. CI confidence interval, HR hazard ratio, N number of patients randomized in Asian subgroup, Q4W every 4 weeks, SRE skeletal-related event. HR < 1 favors denosumab
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Progression-Free Survival
A PFS event had occurred in 63 Asian patients overall (32.1%), including 31/103 (30.1%) patients in the denosumab group and 32/93 (34.4%) patients in the zoledronic acid group. The median PFS (95% CI) was 29.7 (23.2–NE) months in the denosumab group and 30.2 (24.6–NE) months in the zoledronic acid group (hazard ratio [95% CI], 0.71 [0.39–1.28]; descriptive P = 0.26) (Fig. 3).
Fig. 3
Progression-free survival for Asian subgroup. CI confidence interval, HR hazard ratio, N number of patients randomized in Asian subgroup, Q4W every 4 weeks. HR < 1 favors denosumab
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Safety and Tolerability
All Asian patients who received at least one active dose of denosumab or zoledronic acid experienced at least one treatment-emergent AE. The most common AEs reported in either group were diarrhea, nausea, pyrexia, upper respiratory tract infection, and constipation (Table 2). Fewer treatment-emergent AEs associated with renal toxicity occurred in the Asian patients receiving denosumab (8.8% [9/102]) versus zoledronic acid (21.7% [20/92]; Table 3). The most common AE associated with renal toxicity was an increased level of serum creatinine.
Table 2
Treatment-emergent adverse events occurring in at least 20% of patients in either treatment subgroup
Denosumab 120 mg SC Q4W (N = 102)
Zoledronic acid 4 mg IV Q4W (N = 92)
Treatment-emergent AE, n (%)
102 (100.0)
92 (100.0)
Diarrhea
52 (51.0)
47 (51.1)
Nausea
43 (42.2)
43 (46.7)
Pyrexia
39 (38.2)
38 (41.3)
Upper respiratory tract infection
38 (37.3)
37 (40.2)
Constipation
34 (33.3)
29 (31.5)
Neutropenia
32 (31.4)
19 (20.7)
Decreased appetite
31 (30.4)
31 (33.7)
Insomnia
30 (29.4)
28 (30.4)
Cough
28 (27.5)
20 (21.7)
Anemia
26 (25.5)
20 (21.7)
Thrombocytopenia
26 (25.5)
14 (15.2)
Rash
25 (24.5)
19 (20.7)
Hypokalemia
23 (22.5)
22 (23.9)
Vomiting
21 (20.6)
23 (25.0)
Back pain
19 (18.6)
21 (22.8)
Neuropathy peripheral
19 (18.6)
19 (20.7)
Herpes zoster
14 (13.7)
24 (26.1)
Preferred terms are sorted by descending order of frequency in the denosumab group and coded using MedDRA version 19.0
AE adverse event, IV intravenously, MedDRA Medical Dictionary for Regulatory Activities, Q4W every 4 weeks, SC subcutaneously
Table 3
Treatment-emergent adverse events potentially associated with renal toxicity
Denosumab 120 mg SC Q4W (N = 102)
Zoledronic acid 4 mg IV Q4W (N = 92)
Treatment-emergent renal AE, n (%)
9 (8.8)
20 (21.7)
Blood creatinine increased
5 (4.9)
12 (13.0)
Renal failure
2 (2.0)
1 (1.1)
Urine output decreased
2 (2.0)
0
Acute kidney injury
0
4 (4.3)
Renal impairment
0
3 (3.3)
Blood urea increased
0
1 (1.1)
Acute renal failure standardized MedDRA query is used. Preferred terms are sorted by descending order of frequency in the denosumab group and coded using MedDRA version 19.0
AE adverse event, IV intravenously, MedDRA Medical Dictionary for Regulatory Activities, Q4W every 4 weeks, SC subcutaneously
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For AEs of interest, the incidences of positively adjudicated osteonecrosis of the jaw were 6.9% (7/102) and 5.4% (5/92) in the denosumab and zoledronic acid groups, respectively, and the incidences of treatment-emergent hypocalcemia AEs were 18.6% (19/102) and 18.5% (17/92), respectively. Other AEs of interest (e.g., musculoskeletal pain, cardiac disorders, vascular disorders, and infections) also occurred in similar percentages of Asian patients in each treatment group (data not shown). Treatment-emergent AEs potentially associated with hypersensitivity were reported in 43.1% (44/102) versus 35.9% (33/92) of patients in the denosumab and zoledronic acid groups, respectively. Among the hypersensitivity AEs, rash (denosumab, 24.5% [25/102]; zoledronic acid, 20.7% [19/92]) was the most commonly reported hypersensitivity AE. Positively adjudicated atypical femur fracture was not reported in any patient.
Discussion
In the current analysis, results from the Asian subgroup were overall comparable to results of the full study population [21]. Fewer Asian patients in the denosumab group developed a first on-study SRE versus those in the zoledronic acid group. The time to first on-study SRE had a trend favoring the denosumab group versus the zoledronic acid group. Moreover, no safety differences between denosumab and zoledronic acid were found in Asian patients with newly diagnosed MM.
A large-scale clinical trial comparing the effect of denosumab versus zoledronic acid on the time for SRE in newly diagnosed MM has been conducted [21]. Few previous reports have focused on denosumab versus zoledronic acid for preventing SREs in Asian patients with MM. Similarly, in a retrospective study comparing treatment with denosumab to zoledronic acid in 242 Asian postmenopausal women with estrogen receptor-positive breast cancer, patients treated with denosumab had a significantly delayed time to the first on-study symptomatic skeletal event (SSE) and a decreased risk of SSEs [28].
In the exploratory endpoint of PFS, a trend towards improved PFS with denosumab versus zoledronic acid in the Asian subgroup was observed which was comparable with results in the full study population [21]. In the current subgroup analysis, most patients received frontline treatments with proteasome inhibitors and/or immunomodulatory drugs, allowing for unbiased comparisons of the SRE-protective effects of denosumab and zoledronic acid in the era of novel agents.
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The incidences and types of AEs for the Asian subgroups were comparable to those in the full study population [21]. Denosumab has previously demonstrated a favorable safety profile in several clinical trials conducted in Asian populations for various indications, with the majority of AEs being mild in severity [29‐31]. There was no significant difference in incidence of osteonecrosis of the jaw between the two groups. Nephrotoxicity is a well-known AE of zoledronic acid, and therefore renal toxicity is of particular concern when treating patients with renal impairment with zoledronic acid [32], which is not the case with denosumab [17, 20]. As expected, in this Asian subgroup analysis, incidence of renal toxicity was higher in the zoledronic acid group than in the denosumab group (Table 3). Interestingly, a retrospective observational single-center study of 118 Japanese patients with bone metastases secondary to urological malignancies demonstrated a significant improvement in renal function among patients who switched from zoledronic acid to denosumab [33]. This observation may suggest a safer renal profile for denosumab than zoledronic acid as in the case of patients with MM.
Some limitations of this study include that no MM response data were collected and patients with a creatinine clearance of less than 30 mL/min were not permitted to enroll because of the blinded nature of the study. It should be noted that a history of SRE prior to study enrollment is a risk factor for subsequent SREs, which may have confounded the time to on-study SRE between the denosumab and zoledronic acid groups. Additionally, differences in first-line therapy, specifically the higher rate of proteasome inhibitors with immunomodulatory drugs in the denosumab arm, may also have impacted on time to on-study SRE and PFS. Lastly, it was a subgroup analysis with a limited number of patients that was insufficiently powered to detect a difference between the two treatment groups; therefore, the observed trends should be interpreted cautiously and may not be applicable to all Asian patients with MM and lytic bone lesions that are treated in clinical practice.
Conclusions
Results from the Asian subgroup analysis were comparable to those from the full study population. This analysis overall also supports the role of denosumab as an effective alternative treatment option to zoledronic acid in the standard of care for Asian patients with newly diagnosed MM and osteolytic lesions.
Acknowledgements
We thank the participants of the study.
Funding
This study was supported by Amgen Inc. and Amgen Global Publications. Sponsorship for the journal’s Rapid Service and Open Access fee were funded by Amgen Inc.
Medical Writing Assistance
The authors thank Erin P. O’Keefe, PhD and Rick Davis, MS, RPh (Complete Healthcare Communications, a CHC Group company, North Wales, PA, USA), whose work was funded by Amgen Inc., and Yin C. Lin, PhD (Amgen Inc.), for medical writing assistance in the preparation of this manuscript.
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.
Disclosures
Chang-Ki Min and Shang-Yi Huang have nothing to disclose. Sung-Soo Yoon has received consulting fees from or served an advisory role for Janssen, Takeda, Amgen, Celgene, Novartis, and Astellas; has received honoraria from Novartis; and has received research funding from Yuhan Pharmaceutical, Kyowa Kirin, Roche-Genentech. Kazuyuki Shimizu has received consulting fees from Daiichi-Sankyo Co., Ltd, and Fujimoto Pharmaceutical Group and is a member of the Denosumab 20090482 Global Steering Committee (Amgen Inc.). Wee Joo Chng has received research grants from Janssen, Merck, Celgene, and ASLAN and reports consulting fees from Amgen, AbbVie, Celgene, Janssen, Takeda, and Sanofi. Cheng-Shyong Chang has received consulting fees from Novartis, Roche, Takeda, Celgene, Janssen, AbbVie, and BMS and is on the speakers bureau for Novartis, Janssen, Roche, and BMS. Raymond Siu-Ming Wong has received research grants from Amgen, Bayer, Novartis, Archigen, Baxalta, Pfizer, Apellis, Roche, Boehringer Ingelheim, GlaxoSmithKline, and AbbVie; reports consulting fees from Amgen, Alexion, Boehringer Ingelheim, and GlaxoSmithKline; and is on the speakers bureau for Novartis, Amgen, Astellas, and Bayer. Seasea Gao and Steve Gordon are employees of Amgen Asia Holding Ltd and stockholders in Amgen Inc. Yang Wang and Anthony Glennane are employees of, and stockholders in, Amgen Inc.
Compliance with Ethics Guidelines
The study was conducted in accordance with Good Clinical Practice and study investigators obtained approval from their respective independent ethics committee or institutional review board before study initiation. Written informed consent was provided by patients before any protocol-specific procedures and before the administration of any study drug.
Data Availability
Qualified researchers may request data from Amgen clinical studies. Complete details are available at the following: http://www.amgen.com/datasharing.
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