. 2019 Apr;25(14):1653–1662. doi: 10.2174/1381612825666190619125426
© 2019 Bentham Science Publishers
This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
Fig. (2).
Quality of included studies.