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. 2017 Jan;6(1):18–26. doi: 10.21037/tp.2016.12.01

Figure 2.

Figure 2

Assessment of 148 citations by the crowd at each screening level. Four reviewers assessed each citation and selected one of three options (retain, exclude, unclear). Citations were stratified depending on the combination of the four assessments. Number of eligible citations refers to the true positives identified by the gold-standard approach (two trained experts).