Fig. 1: Forest plots for the meta-analyses.
From: On meta-analytic models and the effect of hydroxychloroquine use in COVID-19

a Cumulative meta-analysis (in chronological order) for published studies, using the Hartung–Knapp method as in ref. 2. The total number of events added by each study is also highlighted. Studies given zero weight are not shown on the plot. b Meta-analysis of HCQ effect on COVID-19 hospitalization, using the same data as in ref. 9.