1. Faculty of Health Sciences, University of Western Ontario, London, Ontario, Canada
2. Division of Physical Medicine and Rehabilitation, Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
3. Division of Geriatric Medicine, Department of Medicine, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
4. Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
5. Gait and Brain Lab, Parkwood Institute, Lawson Health Research Institute, London, Ontario, Canada
6. Department of Physical Medicine and Rehabilitation, Parkwood Institute, London, Ontario, Canada
7. Department of Physical Medicine and Rehabilitation, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
8. School of Physical Therapy, University of Western Ontario, London, Ontario, Canada