1. Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
2. Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
3. School of Medicine, City University of New York, New York, NY, USA
4. Department of Kinesiology and Physical Education, Northern Illinois University, Dekalb, IL, USA