. 2017 May 23;2017:7261468. doi: 10.1155/2017/7261468
Copyright © 2017 Emanuele Maria Giusti 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 chart diagram for study selection.