1. Clinical Kinesiology Laboratory, The Physical Therapy Department, The University of Montana, Missoula, MT 59812 4680, USA. Tel.: +1 406 243 4753/5183; Fax: +1 406 243 2795; E-mail: rgajdos@selway.umt.edu
2. St. Patrick Hospital, Missoula, MT 59802, USA
3. Northern Rockies Rehabilitation & Athletic Training Center, Missoula, MT 59804, USA