1. HIV Clinic, Naval Medical Center San Diego, San Diego, California.
2. Infectious Disease Clinical Research Program (IDCRP), Uniformed Services University of the Health Sciences, Bethesda Maryland.
3. Infectious Disease Clinic, National Naval Medical Center, Bethesda, Maryland.
4. Naval Medical Research Center, Rockville, Maryland.
5. Graduate School of Public Health, San Diego State University, San Diego, California.