Ray Kristin N, Chari Amalavoyal V, Engberg John, Bertolet Marnie, Mehrotra Ateev
Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
Department of Economics, University of Sussex, Brighton, England.
JAMA Intern Med. 2015 Dec;175(12):1983-6. doi: 10.1001/jamainternmed.2015.4468.