Correction to: Head Face Med (2019) 15:23
https://doi.org/10.1186/s13005-019-0207-7
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Following publication of the original article [1], the author informed that Table 5 was incorrectly captured which is actually an older version of Table 4. The corrected Table 5 is provided below.
Table 5
Details of the selected articles (n = 341) regarding the type of article and methodological parameters
Article type | n (%) * | Statistics (%)** | Control group*** | Sample size | Articles |
|---|---|---|---|---|---|
Interventional clinical trials | 6 (1.8%) | 6 (100%) | 6 (100%) | ≤ 20 | 1 |
> 20 | 5 | ||||
Observational studies | 70 (20.5%) | 50 (71.4%) | 9 (12.8%) | ≤ 20 | 8 |
> 20 | 62 | ||||
Case reports/series | 58 (17.1%) | 0 (0%) | – | = 1 | 43 |
> 1 | 15 | ||||
Laboratory studies | 96 (28.1%) | 0 (0%) | – | – | – |
Systematic reviews | 3 (0.9%) | 3 (100%) | – | – | – |
Narrative reviews | 16 (4.7%) | 2 (12.5%) | – | – | – |
Interviews | 2 (0.6%) | 0 (0%) | – | – | – |
Informative studies | 40 (11.7%) | 0 (0%) | – | – | – |
Others | 50 (14.7%) | – | – | – | – |
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