Systematic Reviews
Copyright ©The Author(s) 2020.
World J Gastrointest Oncol. Feb 15, 2020; 12(2): 228-236
Published online Feb 15, 2020. doi: 10.4251/wjgo.v12.i2.228
Figure 1
Figure 1 The Preferred Reporting Item for Systematic Reviews and Meta-analyses flow diagram of the studies included in this review.