[1] Univ British Columbia, Vancouver, BC, Canada
[2] St Pauls Hosp, Ctr Hlth Evaluat & Outcomes Sci, Vancouver, BC, Canada
[3] Arthrit Res Canada, Richmond, BC, Canada
[4] Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC, Canada
[5] Ctr Hlth Evaluat & Outcomes Sci, Vancouver, BC, Canada
[6] Univ British Columbia, Pharmaceut Sci, Vancouver, BC, Canada
[7] Collaborat Outcomes Res & Evaluat, Vancouver, BC, Canada