[1] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[2] Spanish Federat Spondyloarthrit Assoc CEADE, Madrid, Spain
[3] Reina Sofia Univ Hosp, Cordoba, Spain
[4] Univ Cordoba, Maimonides Biomed Res Inst Cordoba IMIBIC, Cordoba, Spain
[5] Univ Hosp La Paz, IdiPAZ, Madrid, Spain
[6] Hosp Fdn Alcorcon, Madrid, Spain
[7] Novartis Spain, Barcelona, Spain
[8] Hosp Univ Parc Tauli, Sabadell, Spain
[9] Med Dept UAB, I3PT, Barcelona, Spain
[10] Axial Spondiloarthrit Int Federat ASIF, London, England