1. US Army Medical Research & Development Command, 504 Scott Street, Fort Detrick, MD 21702, USA
2. Department of Health Promotion, Education, & Behavior, Arnold School of Public Health, University of South Carolina, 915 Greene Street, Columbia, SC 29208, USA
3. Department of Exercise Science, Arnold School of Public Health, University of South Carolina, 1300 Wheat Street, Columbia, SC 29208, USA
4. D.D. Eisenhower Army Medical Center, 300 E Hospital Road, Fort Gordon, GA 30905, USA