Ann Intern Med -- Nygren et al. 148 (3): 220 Figure 2

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Figure 2. Search and selection of literature for all key questions.

BV = bacterial vaginosis; RCT = randomized, controlled trial. *Cochrane databases include the Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and Database of Abstracts of Reviews of Effects. ${dagger}$ Other sources include reference lists and expert suggestions. ${ddagger}$ We included 7 additional studies for key question 2 and 2 for key question 3 from the 2001 report in the summary of this evidence.