1. From the Department of Medicine, Brigham and Women’s Hospital (I.T.K., R.W.), Harvard Medical School (I.T.K., R.W., A.M.B.), Massachusetts General Hospital Center for Global Health (I.T.K.), and Ariadne Labs (R.W.) — all in Boston; the Harvard Global Health Institute (I.T.K., A.M.B.), and Harvard University (A.M.B.) — both in Cambridge, MA; and the Desmond Tutu HIV Centre, University of Cape Town, Cape Town, South Africa (L.-G.B.).