Department of Physical Therapy,National Cheng Kung University,Tainan 701,Taiwan,China;
Sports Biomechanics Laboratory,Beijing Sports University,Beijing 100084,China;
Center for Human Movement Science,Division of Physical Therapy,The University of North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
Department of Orthopaedic Surgery,The University of North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
Department of Biomnedical Engineering,The University af North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
Division of Orthopaedic Surgery,Duke University Medical Center,Durham,NC 27710,USA;
Center for Human Movement Science,Division of Physical Therapy,The University of North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
Department of Orthopaedic Surgery,The University of North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
Department of Biomnedical Engineering,The University af North Carolina at Chapel Hill,Chapel Hill,NC 27599,USA;
