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. 2018 Sep 28;51(3):180–188. doi: 10.5115/acb.2018.51.3.180

Fig. 1. Flowchart of search that was carried out through five different electronic databases including MEDLINE, EMBASE, ProQuest, BIOSIS, and Scopus. Out of 2,270 articles that were found, 28 studies were subjected to a meta-analysis that is based on inclusion and exclusion criteria.

Fig. 1