1 KITE-Toronto Rehabilitation Institute, University Health Network, University of Toronto, Toronto, Canada (Drs Ghisi and Grace); MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, School of Health and Well Being, University of Glasgow, Glasgow, United Kingdom (Dr Taylor); Departamento de Ciencias de La Rehabilitación, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile (Dr. Seron); and Faculty of Health, York University, Toronto, Canada (Dr Grace).