Affiliation: | 1.Division of Prevention Science, Department of Medicine, Center for AIDS Prevention Studies, University of California, San Francisco, 550 16th St., 3rd Floor, San Francisco, CA, 94158, USA ;2.MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa ;3.Ume? Centre for Global Health Research, Division of Epidemiology and Global Health, Department of Public Health and Clinical Medicine, Ume? University, Ume?, Sweden ;4.Division of Epidemiology and Biostatistics, School of Public Health, University of California Berkeley, Berkeley, CA, USA ;5.Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA ; |