Institution: | 1. Escuela de Antropología, Universidad Nacional Mayor de San Marcos, Lima, Peru.; 2. Department of Population Health and Disease Prevention, University of California Irvine, Irvine, California, United States of America.; 3. Epicentro, Lima, Peru.; 4. Epidemiology, STD and HIV Unit, School of Public Health and Administration, Universidad Peruana Cayetano Heredia, Lima, Peru.; University of Washington, United States of America, |