Jennifer Blackwood1, Kateri Rybicki2, Min Huang2. 1. Physical Therapy Department, University of Michigan-Flint, 2157 William S. White Building 303 East Kearsley Street Flint, MI 48502-1950, USA. Electronic address: jblackwo@umich.edu. 2. Physical Therapy Department, University of Michigan-Flint, 2157 William S. White Building 303 East Kearsley Street Flint, MI 48502-1950, USA.