1. Nepal International Clinic/Himalaya Rescue Association; Clinical Physiology, Tribhuvan University, Nepal; and Patan Hospital, Katmandu, Nepal
2. The Johns Hopkins University/Sinai Hospital of Baltimore Program in Internal Medicine, Baltimore, MD
3. Division of Geographic Medicine, Department of Medicine, Division of Infectious Diseases and Tropical Pediatrics, Department of Pediatrics, Travelers' Health Clinic, University of Maryland Faculty Practice, Baltimore, MD; Department of Clinical Research, Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, MD