Systematic Reviews
Copyright ©The Author(s) 2018.
World J Gastroenterol. Jul 28, 2018; 24(28): 3171-3180
Published online Jul 28, 2018. doi: 10.3748/wjg.v24.i28.3171
Figure 1
Figure 1 PRISMA flowchart depicting literature search. References are indexed by superscript numericals.