Systematic Reviews
Copyright ©The Author(s) 2016.
World J Gastroenterol. Jan 28, 2016; 22(4): 1721-1726
Published online Jan 28, 2016. doi: 10.3748/wjg.v22.i4.1721
Figure 1
Figure 1 Flowchart showing search strategy for systematic review. EMVI: Extramural venous invasion.