[1] Univ South Australia, IIMPACT Hlth, Adelaide, SA, Australia
[2] Neurosci Res Australia, Ctr Pain IMPACT, Sydney, NSW, Australia
[3] Univ New South Wales, Sch Hlth & Med Sci, Sydney, NSW, Australia
[4] Univ Adelaide, Fac Hlth & Med Sci, Adelaide, SA, Australia
[5] Northern Adelaide Local Hlth Network, Adelaide, SA, Australia
[6] Erasmus Univ, Dept Gen Practice, Rotterdam, Netherlands
[7] Univ Ottawa, Bruyere Res Inst, Ottawa, ON, Canada
[8] Univ Ottawa, Dept Med, Ottawa, ON, Canada
[9] Univ Ottawa, Sch Epidemiol, Ottawa, ON, Canada