[1] Copenhagen Univ Hosp, Dept Rheumatol, Parker Inst, Musculoskeletal Stat Unit, Bispebjerg, Denmark
[2] Copenhagen Univ Hosp, Dept Rheumatol, Parker Inst, Musculoskeletal Stat Unit, Frederiksberg, Denmark
[3] Univ Copenhagen, Dept Nutr Exercise & Sports, Frederiksberg, Denmark
[4] Copenhagen Univ Hosp, Dept Rheumatol, Musculoskeletal Stat Unit, Parker Inst, Copenhagen, Denmark
[5] Univ Copenhagen, Dept Nutr Exercise & Sports, Copenhagen, Denmark
[6] Copenhagen Univ Hosp, Dept Rheumatol, Parker Inst, Copenhagen, Denmark
[7] Univ Calif Los Angeles, David Geffen Sch Med, Med, Los Angeles, CA 90095 USA
[8] Univ Texas MD Anderson Canc Ctr, Gen Internal Med, Houston, TX 77030 USA
[9] Cochrane Collaborat, Musculoskeletal Grp, Ottawa, ON, Canada