[1] McGill Univ, Montreal, PQ, Canada
[2] Univ Western Ontario, London, ON, Canada
[3] Univ Calgary, Calgary, AB, Canada
[4] Laval Univ, Quebec City, PQ, Canada
[5] Univ Sherbrooke, Sherbrooke, PQ, Canada
[6] Southlake Reg Hlth Ctr, Newmarket, Suffolk, England
[7] Arthrit Program Res Grp, Newmarket, Suffolk, England
[8] Univ Toronto, Toronto, ON, Canada
[9] Univ Manitoba, Winnipeg, MB, Canada
[10] Hosp Special Surg, 535 E 70th St, New York, NY 10021 USA