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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Pharmacoepidemiol Drug Saf. 2016 Sep 5;25(12):1343–1353. doi: 10.1002/pds.4076

Figure 1.

Figure 1

Flow diagram of studies considered for inclusion

*Web of Science used to index any paper citing one of 4 seminal papers in probabilistic bias analysis.3,14,18,20

†Google Scholar used to index any paper citing a seminal book and paper that were not available in Web of Science database.2,21