1. Department of Physical Therapy, College of Arts and Sciences, Whitworth University , Spokane, WA , USA
2. School of Nursing, Academic Health Center, University of Minnesota , Minneapolis, MN , USA
3. Division of Physical Therapy, Medical School, University of Minnesota , Minneapolis, MN , USA
4. Division of Rehabilitation Science, Medical School, University of Minnesota , Minneapolis, MN , USA
5. Division of Biostatistics, School of Public Health, University of Minnesota , Minneapolis, MN , USA