[1] Univ Seville, HTR, Seville, Spain
[2] Spanish Federat Spondyloarthrit Patient Assoc CEA, Madrid, Spain
[3] La Paz Univ Hosp, Hosp La Paz, Inst Hlth Res IdiPAZ, Madrid, Spain
[4] Sanatorio Julio Mendez, Buenos Aires, DF, Argentina
[5] Cardiff Univ, Cardiff, Wales
[6] Cyprus League People Rheumatism CYLPER, Nicosia, Cyprus
[7] Mumbai Arthrit Clin, Mumbai, Maharashtra, India
[8] Axial Spondyloarthrit Int Federat, London, England
[9] CSA, Toronto, ON, Canada
[10] Charite Univ Med Berlin, Berlin, Germany