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Fig. 1 | BMC Infectious Diseases

Fig. 1

From: Association between convalescent plasma treatment and mortality in COVID-19: a collaborative systematic review and meta-analysis of randomized clinical trials

Fig. 1

Flowchart of the data collection process. aOf 102 potentially eligible trials, 7 had publications available, and investigators of trials unpublished at the time of our initial search by September 28, 2020 or at an update on March 1, 2021, with a valid email address were contacted (n = 90); of these, 51 responded. All trials that were potentially eligible but not included are described in Additional file 4. bTrials excluded as “withdrawn” are trials labelled as such on the registries (such trials will never be conducted)

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