[1] Univ Hlth Network, Toronto, ON, Canada
[2] Univ Manchester, Manchester, Lancs, England
[3] Manchester Univ Hosp NHS Fdn Trust, Manchester, Lancs, England
[4] Univ Hlth Network, Schroeder Arthrit Inst, Toronto, ON, Canada
[5] Hosp Sick Children, Toronto, ON, Canada
[6] Univ Toronto, Univ Hlth Network, Toronto, ON, Canada
[7] UHN TWH, Toronto, ON, Canada
[8] Univ Toronto, Univ Hlth Network, Krembil Brain Inst, Toronto, ON, Canada
[9] Univ Hlth Network, Toronto Rehabil Inst, Toronto, ON, Canada
[10] Univ Calif San Francisco, San Rafael, CA USA
[11] Inst Work & Hlth, Toronto, ON, Canada
[12] Univ Toronto, Toronto, ON, Canada