1. Operational Infectious Diseases, Naval Health Research Center , San Diego, CA 92106, USA
2. General Dynamics Information Technology , San Diego, CA 92106, USA
3. Sleep, Tactical Efficiency, and Endurance Laboratory, Warfighter Performance Department, Naval Health Research Center , San Diego, CA 92106, USA
4. Leidos Inc. , San Diego, CA 92106, USA
5. Health and Behavioral Sciences Department, Naval Health Research Center , San Diego, CA 92106, USA