1. a Physical Medicine and Rehabilitation , Emory University , Atlanta , Georgia , USA
2. b Kinesiology, University of Wisconsin , Madison , Wisconsin , USA
3. c Health, Physical Education, and Recreation , University of Nebraska at Omaha , Omaha , Nebraska , USA
4. d Exercise and Sports Science , University of North Carolina , Chapel Hill , North Carolina , USA
5. e Orthopaedics and Rehabilitation , University of Florida , Gainesville , Florida , USA