12 Petrilli CM, Jones SA, Yang J, Rajagopalan H, O'Donnell LF, Chernyak Y, et al. Factors associated with hospitalization and critical illness among 4,103 patients with COVID-19 disease in New York City. medRxiv 2020:2020.04.08.20057794.
13 Rentsch CT, Kidwai-Khan F, Tate JP, Park LS, King JT, Skanderson M, et al. Covid-19 Testing, Hospital Admission, and Intensive Care Among 2,026,227 United States Veterans Aged 54-75 Years. medRxiv 2020:2020.04.09.20059964.
16 Rossi G, Marino P, Formisano M, Venturelli D, Vicentini F, Grilli M, et al. Characteristics and outcomes of a cohort of SARS-CoV-2 patients in the Province of Reggio Emilia, Italy. medRxiv 2020:2020.04.13.20063545.
17 Pigoga JL, Friedman A, Broccoli M, Hirner S, Naidoo AV, Singh S, et al. Clinical and historical features associated with severe COVID-19 infection: a systematic review. medRxiv 2020:2020.04.23.20076653.
23 Rubin SJS, Falkson SR, Degner N, Blish C. Clinical characteristics associated with COVID-19 severity in California. medRxiv 2020:2020.03.27.20043661.