1. Department of Medicine, Division of Infectious Diseases, UT Health Science Center San Antonio, San Antonio, Texas.
2. Department of Research and Information Management, University Health System, San Antonio, Texas.
3. Department of Medicine, Division of Infectious Diseases, UT Southwestern Medical Center, Dallas, Texas.
4. Round Rock Cancer Center, Baylor Scott & White Health, Round Rock, Texas.
5. HIV/STD Care Services Group, Texas Department of State Health Services, Austin, Texas.