1. USCENTCOM Office of the Command Surgeon , MacDill AFB, FL 33621, USA
2. Department of Preventive Medicine & Biostatistics, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
3. Department of Marketing, University of Florida , Gainesville, FL 32611, USA
4. Department of Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
5. Air Force Medical Agency , Falls Church, VA 22042, USA