1. Department of Medicine, San Antonio Military Medical Center, Fort Sam Houston, TX, USA
2. US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, USA
3. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
4. The EMMES Corporation, Rockville, MD, USA
5. HIV Diagnostics and Reference Laboratory, United States Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, USA
6. Infectious Disease Service, San Antonio Military Medical Center, Fort Sam Houston, TX, USA