Systematic Reviews
Copyright ©The Author(s) 2021.
World J Gastroenterol. Apr 28, 2021; 27(16): 1828-1840
Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1828
Figure 1
Figure 1  Flow chart of the manuscripts included in the final analysis according to the PRISMA reporting guidelines.