1. Houston Department of Health and Human Services, Office of Surveillance and Public Health Preparedness, Houston, TX, USA
2. Department of Internal Medicine, UTHEALTH Medical School, University of Texas Health Science Center, Houston, TX, USA
3. Infectious Diseases Section, Michael E. DeBakey VA Medical Center, Houston, TX, USA
4. Department of Medicine, Baylor College of Medicine, Houston, TX, USA
5. Institute of Community Health, University of Houston College of Pharmacy, Texas Medical Center, Houston, TX, USA
6. Houston Medical Monitoring Project Community Advisory Board, Houston, TX, USA