Dr. Jan Stepanek is the Medical Director of the Aerospace Medicine Program in the Division of Preventive, Occupational & Aerospace Medicine, Department of Internal Medicine at the Mayo Clinic in Scottsdale, AZ.  Dr. Stepanek is an expert in terrestrial high-altitude exposure and associated illnesses such as acute mountain sickness (AMS), HACE (high altitude cerebral edema), HAPE(high altitude pulmonary edema) and their treatment, prevention and preparticipation evaluation.  Dr. Stepanek also specializes in physiological effects of hypoxia, decompression, acceleration and risk mitigation measures; medical concerns arising in corporate aviation and new high altitude capable aircraft; civilian spaceflight and medical evaluation of prospective participants; aerospace physiology and novel avenues for training aircrew.