1. Department of Rehabilitation Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73117 (USA)
2. Department of Physical Therapy, Mercer University, Atlanta, Georgia
3. Rehabilitation Medicine, University of Washington, Seattle, Washington
4. School of Physical Therapy, Elborn College, Faculty of Health Sciences, Western University, London, Ontario, Canada
5. Avery Information Services Ltd, Orillia, Ontario, Canada
6. McMaster University, Department of Health Research Methods, Evidence, and Impact, Hamilton, Ontario, Canada