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. 2021 Dec 30;137(2):197–202. doi: 10.1177/00333549211058732

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Figure. — Sankey diagram of workflow for all reviews published to the Novel Coronavirus Research Compendium website, by source, article type, and primary review group, April 1–December 31, 2020 (N = 472). Preprints are manuscripts made publicly available before peer review. Articles are peer-reviewed and published in journals. Preprints and articles were identified for review either through the triage list in the R Shiny application or through identification through external sources, such as social media or news reports. Abbreviations: NPI, nonpharmaceutical intervention review group; PI, pharmaceutical intervention review group.