[1] Univ Queensland, Sch Hlth & Rehabil Sci, Brisbane, Qld 4072, Australia
[2] Univ Sydney, Inst Bone & Joint Res, Kolling Inst, Sydney Med Sch, Sydney, NSW, Australia
[3] Univ Sydney, Musculoskeletal Hlth Sydney, Sydney, NSW, Australia
[4] Macquarie Univ, Dept Chiropract, Sydney, NSW, Australia
[5] Univ New South Wales Australia, St George & Sutherland Clin Sch, Dept Orthopaed Surg, Spine Serv, Sydney, NSW, Australia
[6] Erasmus MC, Dept Gen Practice, Rotterdam, Netherlands
[7] Univ Southern Denmark, Ctr Muscle & Joint Hlth, Odense, Denmark
[8] Univ Oslo, Dept Gen Practice, Inst Hlth & Soc, Oslo, Norway
[9] Royal North Shore Hosp, Dept Rheumatol, Sydney, NSW, Australia
[10] Boston Univ, Sch Med, Boston Med Ctr, Dept Family Med, Boston, MA 02118 USA
[11] Karolinska Inst, Dept Neurobiol, Care Sci & Soc, Div Physiotherapy, Stockholm, Sweden
[12] Univ Lorraine, CHRU Nancy, INSERM, CIC1433 Epidemiol Clin, Nancy, France
[13] Univ Southern Denmark, Dept Sports Sci & Clin Biomech, Odense, Denmark
[14] Nord Inst Chiropract & Clin Biomech, Odense, Denmark
[15] Univ Melbourne, Sch Hlth Sci, Dept Physiotherapy, Ctr Hlth Exercise & Sports Med, Melbourne, Vic, Australia
[16] Univ Cidade Sao Paulo, Masters & Doctoral Programs Phys Therapy, Sao Paulo, SP, Brazil
[17] McMaster Univ, Sch Rehabil Sci, Hamilton, ON, Canada
[18] Univ Sydney, Fac Hlth Sci, Sydney, NSW, Australia
[19] Univ Warwick, Warwick Med Sch, Coventry, W Midlands, England
[20] Vrije Univ, Amsterdam Movement Sci Res Inst, Fac Sci, Dept Hlth Sci, Amsterdam, Netherlands
[21] Natl Res Ctr Working Environm, Musculoskeletal Disorders & Phys Workload, Copenhagen, Denmark
[22] Linkoping Univ, Fac Med & Hlth Sci, Dept Med & Hlth Sci, Linkoping, Sweden
[23] Curtin Univ, Dept Physiotherapy & Exercise Sci, Perth, WA, Australia
[24] VA Puget Sound Hlth Care Syst, Seattle Epidemiol Res & Informat Ctr ERIC, Seattle, WA USA
[25] VA Puget Sound Hlth Care Syst, Div Rehabil Care Serv, Seattle, WA USA
[26] Univ Washington, Dept Rehabil Med, Seattle, WA 98195 USA
[27] New England Baptist Hosp, Boston, MA USA
[28] Harvard Med Sch, Dept Phys Med & Rehabil, Boston, MA 02115 USA
[29] Geneva Univ Hosp, Fac Med, Div Rheumatol, Geneva, Switzerland