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. 2020 Dec 22;13:4577–4587. doi: 10.2147/IDR.S288399

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© 2020 Dillman et al.

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Distribution of number of arms for (A) all and (B) (hydroxy)chloroquine randomized clinical trials for COVID-19, arranged by clinical setting.

Notes: Each circle represents an individual trial. The colour of each circle represents the sample size: red – 0, 60; orange – 60, 140; green – 140, 400; blue – 400, 60,000 participants.

Abbreviations: PrEP, pre-exposure prophylaxis; PEP, post-exposure prophylaxis; ICU, intensive care unit.