Asch David A, Grischkan Justin, Nicholson Sean
From the University of Pennsylvania and the Corporal Michael J. Crescenz Department of Veterans Affairs Medical Center - both in Philadelphia (D.A.A.); Massachusetts General Hospital, Boston (J.G.); and Cornell University, Ithaca, NY (S.N.).
N Engl J Med. 2020 Jul 2;383(1):6-9. doi: 10.1056/NEJMp1916528.