1. Department of Health and Human Performance, Middle Tennessee State University, Murfreesboro, TN, USA
2. Department of Public Health, University of Texas School of Human Ecology, Austin, TX, USA
3. Emerging and Acute Infectious Disease Branch, Texas Department of State Health Services, Austin, TX, USA
4. Department of Epidemiology and Biostatistics, Texas A&M School of Public Health, College Station, TX, USA
5. Department of Health Policy and Management, Texas A&M School of Public Health, College Station, TX, USA
6. Department of Environmental and Occupational Health, Texas A&M School of Public Health, College Station, TX, USA
7. Department of Epidemiology, University of Delaware, Newark, DE, USA