. 2020 Dec 15;2020:8857385. doi: 10.1155/2020/8857385
Copyright © 2020 Remco Tuijt et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
PRISMA flow diagram of included studies.