[1] Diakonhjemmet Hosp, Ctr Treatment Rheumat & Musculoskeletal Dis REMED, Oslo, Norway
[2] Inland Norway Univ Appl Sci, Publ Hlth, Elverum, Norway
[3] Karolinska Inst, Dept Med Solna, Clin Epidemiol Div, Stockholm, Sweden
[4] Landspitali Univ Hosp, Ctr Rheumatol Res, Reykjavik, Iceland
[5] Univ Iceland, Fac Med, Reykjavik, Iceland
[6] Univ Copenhagen, Fac Hlth & Med Sci, Clin Med, Copenhagen, Denmark
[7] Rigshosp, DANBIO, Copenhagen, Denmark
[8] Rigshosp, Copenhagen Ctr Arthrit Res, Ctr Rheumatol & Spine Dis, Copenhagen, Denmark
[9] Landspitali Univ Hosp, Rheumatol, Reykjavik, Iceland
[10] Helsinki Univ Hosp, Helsinki, Finland
[11] Univ Helsinki, Dept Med & Rheumatol, ROBFIN, Helsinki, Finland
[12] Minist Social Affairs & Hlth, Pharmaceut Pricing Board, Helsinki, Finland
[13] Karolinska Univ Hosp, Rheumatol Theme Inflammat & Ageing, Stockholm, Sweden