New England Journal of Medicine
May 17, 2018   Vol. 378 No. 20
http://www.nejm.org/toc/nejm/medical-journal

HIV Population Surveys — Bringing Precision to the Global Response
Jessica E. Justman, M.D., Owen Mugurungi, M.D., and Wafaa M. El-Sadr, M.D., M.P.H.