1. Armed Forces Health Surveillance Branch, US Navy Integrated Biosurveillance Section, Medical Corps, Silver Spring, MD, USA
2. Hospitalist Section, Washington DC Veterans Affairs Medical Center, Washington, DC, USA
3. Department of Medicine, School of Medicine and Health Sciences, George Washington University, Washington, DC, USA
4. Emerging Infectious Diseases and Antimicrobial Resistance, Infectious Disease Clinical Research Program, Division of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
5. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc, Bethesda, MD, USA