. 2020 Jun 11;5:28. Originally published 2020 Feb 13. [Version 2] doi: 10.12688/wellcomeopenres.15730.2
Copyright: © 2020 Mutua AM et al.
This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 3. Sample sizes and types of studies included in the review.
