highest hemoglobin & clotting factor they had ever seen.
Warfarin Rx for blood clotting disorder would be unlikely for simple mild polycythemia (extra red blood cells) associated with frequent trips to moderate altitude.
Then again, there are some folks who get Chronic Mountain Sickness. This is unheard of in casual Sierra hikers, but seen in those who live their lives at say 10,000 ft and usually higher, like in the Andes. The other name for CMS is Monge's Disease, after the South American MD who described it.
http://en.wikipedia.org/wiki/Chronic_mountain_sickness Note: CMS is far, far different than the AMS we often discuss here.
