Fennelly Kevin, Whalen Christopher C
National Heart, Lung, and Blood Institute, Bethesda, MD 20853, USA.
Global Health Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, GA, USA.
Lancet. 2020 Oct 31;396(10260):1393. doi: 10.1016/S0140-6736(20)32214-5.