van Panhuis Willem G, Grefenstette John, Jung Su Yon, Chok Nian Shong, Cross Anne, Eng Heather, Lee Bruce Y, Zadorozhny Vladimir, Brown Shawn, Cummings Derek, Burke Donald S
From the Departments of Epidemiology (W.G.P., S.Y.J., N.S.C., H.E., D.S.B.) and Biostatistics (J.G., A.C., S.B.), Graduate School of Public Health, the Department of Medicine, School of Medicine (B.Y.L.), and the Graduate Information Science and Technology Program, School of Information Sciences (V.Z.), University of Pittsburgh, Pittsburgh; and the Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore (D.C.).
N Engl J Med. 2013 Nov 28;369(22):2152-8. doi: 10.1056/NEJMms1215400.