[1] Univ Washington, Harborview Med Ctr, Div Pulm & Crit Care Med, Seattle, WA 98104 USA
[2] Univ Utah, Div Emergency Med, Salt Lake City, UT USA
[3] Univ Utah, Intermt Med Ctr, Div Pulm & Crit Care Med, Salt Lake City, UT USA
[4] Stanford Univ, Sch Med, Div Emergency Med, Dept Surg, Palo Alto, CA 94304 USA
[5] Univ Utah, Coll Nursing, Salt Lake City, UT 84112 USA
[6] Univ Utah, Sch Med, Salt Lake City, UT 84112 USA
[7] Bozeman Deaconess Hosp, Bozeman, MT USA
[8] Himalayan Rescue Assoc, Kathmandu, Nepal
[9] Univ Colorado Denver, Sch Med, Altitude Res Ctr, Div Emergency Med, Denver, CO USA
[10] Inst Altitude Med, Telluride, CO USA