[1] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[2] Hosp Univ Parc Tauli, Dept Rheumatol, Barcelona, Spain
[3] Reina Sofia Univ Hosp, Dept Rheumatol, Cordoba, Spain
[4] Hosp Univ Fdn Alcorcon, Dept Rheumatol, Madrid, Spain
[5] Novartis Farmaceut Spain, Immunol Hepatol & Dermatol, Barcelona, Spain
[6] Spanish Federat Spondyloarthrit Associat CEAD, Patient Advocacy, Madrid, Spain
[7] Hosp Univ La Paz, Madrid, Spain