1. Consorcio de Investigación Sobre VIH/SIDA/TB, Ciudad de México, México
2. Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
3. St. Jude Children's Research Hospital, Memphis, TN, USA
4. Center on Gender Equity and Health, Division of Infectious Diseases and Global Public Health, School of Medicine, University of California, San Diego, La Jolla, CA, USA
5. Oregon Health and Science University, Portland, OR, USA
6. Centro Nacional de Epidemiología, Ministerio de Salud Pública y Asistencia Social, Guatemala City, Guatemala