1. Department of Physical Therapy and Rehabilitation Sciences, Drexel University, Philadelphia, PA, USA;
2. School of Physical Therapy, Western University, London, Ontario, Canada;
3. Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA;
4. Department of Physical Therapy, Mercer University, Atlanta, GA, USA;
5. Department of Rehabilitation Sciences, The University of Oklahoma Health Sciences Centre, Oklahoma, OK, USA;
6. Department of Epidemiology and Biostatistics, Western University, London, Ontario, Canada