1. Nepal International Clinic, Kathmandu, Nepal.
2. Himalayan Rescue Association, Kathmandu, Nepal.
3. Institute for Altitude Medicine, Telluride, Colorado.
4. University of Hawaii, John A Burns School of Medicine, Honolulu, Hawaii.
5. Stanford University Medical Center, Stanford, California.
6. Oxofrd University Clinical Research Unit, The Hospital for Tropical Diseases, Ho Chi Minh City, Viet Nam.
7. University of Washington, Seattle, WA.