1. U.S. Army Public Health Command-Central, JBSA Fort Sam Houston, TX, USA
2. Department of Environmental and Occupational Health, Texas A&M University, College Station, TX, USA;
3. Department of Health Behavior, Texas A&M University, College Station, TX, USA;
4. Department of Epidemiology and Biostatistics, Texas A&M University, College Station, TX, USA;
5. Department of Educational Psychology, Texas A&M University, College Station, TX, USA