1. Department of Family Medicine, University of Texas Medical Branch (UTMB), Galveston, Texas, USA.
2. Sealy Institute for Vaccine Sciences, UTMB, Galveston, Texas, USA.
3. Department of Health and Human Performance, University of Houston, Houston, Texas, USA.
4. Management, Policy, and Community Health, School of Public Health, University of Texas, Houston, Texas, USA.
5. School of Nursing, UTMB, Galveston, Texas, USA.
6. Department of Internal Medicine, UTMB, Galveston, Texas, USA.
7. Department of Medicine, Baylor College of Medicine, Houston, Texas, USA.