Chan LE, Casiraghi E, Laraway B, Coleman B, Blau H, Zaman A, Harris NL, Wilkins K, Antony B, Gargano M, Valentini G, Sahner D, Haendel M, Robinson PN, Bramante C, Reese J. Metformin is associated with reduced COVID-19 severity in patients with prediabetes. Diabetes Res Clin Pract. 2022 Dec; 194:110157.