Kourtis Athena P, Read Jennifer S, Jamieson Denise J
From the Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta (A.P.K., D.J.J.); and the Department of Epidemiology and Biostatistics, University of California at San Francisco, San Francisco (J.S.R.).
N Engl J Med. 2014 Jun 5;370(23):2211-8. doi: 10.1056/NEJMra1213566.