[1] Univ Western Ontario, Hlth & Rehabil Sci Program, Hlth & Aging Field, Fac Hlth Sci, London, ON N6G 1H1, Canada
[2] Univ Western Ontario, Sch Phys Therapy, Fac Hlth Sci, London, ON N6G 1H1, Canada
[3] Univ Hosp, Dept Surg, Div Orthopaed Surg, London Hlth Sci Ctr, London, England