1. Uniformed Services University of the Health Sciences, Bethesda, Maryland;
2. Brooke Army Medical Center, Fort Sam Houston, Texas;
3. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland;
4. Department of Preventive Medicine and Biostatistics, Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences, Bethesda, Maryland;
5. Walter Reed National Military Medical Center, Bethesda, Maryland;
6. Landstuhl Regional Medical Center, Landstuhl, Germany;
7. Madigan Army Medical Center, Tacoma, Washington;
8. Naval Medical Center, Portsmouth, Virginia