1. Department of Public Health University of Texas at San Antonio San Antonio TX USA
2. Division of Epidemiology and Biostatistics, School of Public Health San Diego State University San Diego CA, USA
3. Center for Interdisciplinary Research on AIDS (CIRA) Yale University New Haven CT, USA
4. Division of Infectious Diseases and Global Public Health, Department of Medicine University of California San Diego La Jolla CA, USA
5. Department of Community Health Sciences University of California Los Angeles CA, USA