Systematic Reviews
Copyright ©The Author(s) 2017.
World J Gastroenterol. Feb 21, 2017; 23(7): 1289-1297
Published online Feb 21, 2017. doi: 10.3748/wjg.v23.i7.1289
Figure 1
Figure 1 Flow chart of records identified through literature search and those excluded and included for analysis. Initial literature search identified 247 citations. After elimination of duplicate citations and abstract-only articles, 77 articles remained. The full-text articles of these 77 citations were reviewed and 19 studies met eligibility requirements for inclusion.