ALTITUDE DOES NOT REDUCE CONCUSSION INCIDENCE IN PROFESSIONAL FOOTBALL PLAYERS: A POOR UNDERSTANDING OF HEALTH STATISTICS AND ALTITUDE PHYSIOLOGY. - Zavorsky, Gerald S.; Myer, Gregory D.; Smith, David; Barber Foss, Kim D.; DiCesare, Christopher A.; Kiefer, Adam W.; Kushner, Adam M.; Thomas, Staci M.; Sucharew, Heidi; Khoury, Jane C. (Journal of Orthopaedic & Sports Physical Therapy, 2014)