. 2021 Jul 9;11(3):e115868. doi: 10.5812/aapm.115868
Copyright © 2021, Author(s)
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
Figure 1. The PRISMA 2009 flow diagram.
