Borrero Sonya, Zite Nikki, Potter Joseph E, Trussell James
From the Division of General Internal Medicine, University of Pittsburgh School of Medicine, and the Center for Health Equity, Research, and Promotion, Veterans Affairs Pittsburgh Healthcare System - both in Pittsburgh (S.B.); the Department of Obstetrics and Gynecology, University of Tennessee Graduate School of Medicine, Knoxville (N.Z.); the Population Research Center, University of Texas at Austin, Austin (J.E.P.); the Office of Population Research, Princeton University, Princeton, NJ (J.T.); and the Hull York Medical School, Hull, United Kingdom (J.T.).
N Engl J Med. 2014 Jan 9;370(2):102-4. doi: 10.1056/NEJMp1313325.