Systematic Reviews
Copyright ©The Author(s) 2017.
World J Gastroenterol. Mar 28, 2017; 23(12): 2223-2233
Published online Mar 28, 2017. doi: 10.3748/wjg.v23.i12.2223
Figure 1
Figure 1 Flowchart of studies selected. RCT: Randomized controlled trial.