[1] Univ Calgary, Calgary, AB, Canada
[2] Univ Toronto, Toronto, ON, Canada
[3] Southlake Reg Hlth Ctr, Newmarket, ON, Canada
[4] Univ Western Ontario, Schulich Sch Med & Dent, London, ON, Canada
[5] Univ Sherbrooke, CHUS, Sherbrooke, PQ J1K 2R1, Canada
[6] Univ Montreal Hosp Res Ctr CRCHUM, Osteoarthrit Res Unit, Montreal, PQ, Canada
[7] Univ Manitoba, Winnipeg, MB, Canada
[8] Hosp Special Surg, New York, NY 10021 USA