1. Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
2. National Center for Disaster Medicine and Public Health , Rockville, MD 20852, USA
3. The Henry M Jackson Foundation for the Advancement of Military Medicine, Inc. , Bethesda, MD 20817, USA
4. School of Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA