[1] Univ Calgary, Dept Med, Cumming Sch Med, Calgary, AB, Canada
[2] Univ Calgary, Dept Community Hlth Sci, Calgary, AB, Canada
[3] Arthrit Res Canada, Calgary, AB, Canada
[4] McCaig Bone & Joint Hlth Inst, Calgary, AB, Canada
[5] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[6] Alberta Hlth Serv, Hlth Serv Stat & Analyt Methods Analyt DIMER, Calgary, AB, Canada
[7] Alberta Hlth Serv, Calgary, AB, Canada
[8] Univ Alberta, Dept Med, Calgary, AB, Canada
[9] Hosp Special Serv, New York, NY USA
[10] Univ Saskatchewan, Dept Community Hlth & Epidemiol, Saskatoon, SK, Canada
[11] Univ Calgary, Dept Pediat, Alberta Childrens Hosp, Cumming Sch Med, Calgary, AB, Canada
[12] St Clares Mercy Hosp, St John, NF, Canada