1. Institute for Disability and Rehabilitation Research, Canadian Memorial Chiropractic College, Toronto, Ontario, Canada
2. Institute for Disability and Rehabilitation Research, Ontario Tech University, Oshawa, Ontario, Canada
3. Department of Chiropractic, Macquarie University, Sydney, New South Wales, Australia
4. Departments of Orthopaedics and Environmental Medicine, New York University, New York, New York, United States
5. Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada