Fig. 2
From: Novel citation-based search method for scientific literature: application to meta-analyses
Articles screened and studies retrieved in Study 2. a. Number of articles screened for the published meta-analysis, compared with the number selected for screening by the new method (searches for indirect and direct citations combined). b Studies retrieved in Study 2 (searches for indirect and direct citations combined) as percent of the number of studies included in the published meta-analysis (numbered as in Fig. 2a)