1. Department of Medicine-EDP, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, and Walter Reed Army Medical Center, Washington DC
2. Madigan Army Medical Center, Tacoma, WA 98434
3. Uniformed Services University of the Health Sciences, Bethesda, MD 20814
4. General Medicine Service, Uniformed Services University of the Health Sciences, Bethesda, MD 20814