1. Rehabilitation Engineering Lab, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
2. Department of Basic Science and Biomechanics, Faculty of Physical Therapy, Beni-Suef University, Beni-Suef Egypt
3. Department of Basic Science, Faculty of Physical Therapy, Cairo University, Giza Egypt
4. Department of Orthopedic, Faculty of Medicine, Suhag University, Sohag, Egypt