Stensrud Mats J, Hernán Miguel A
Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
Department of Biostatistics, Oslo Centre for Biostatistics and Epidemiology, University of Oslo, Oslo, Norway.
JAMA. 2020 Apr 14;323(14):1401-1402. doi: 10.1001/jama.2020.1267.