Departments of Physical Therapy and Rehabilitation Sciences, University of Kansas Medical Center, Kansas City, KS 66160, USA,Departments of Physical Therapy and Rehabilitation Sciences, University of Kansas Medical Center, Kansas City, KS 66160, USA Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160,USA,Departments of Physical Therapy and Rehabilitation Sciences, University of Kansas Medical Center, Kansas City, KS 66160, USA,VA Medical Center, Kansas City, MO 64128,USA,Departments of Physical Therapy and Rehabilitation Sciences, University of Kansas Medical Center, Kansas City, KS 66160, USA Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160,USA;