[1] Charite, Berlin, Germany
[2] Univ Toronto, Toronto, ON, Canada
[3] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[4] Spanish Federat Spondyloarthritis Assoc CEADE, Madrid, Spain
[5] Sanat Julio Mendez, Buenos Aires, Argentina
[6] Axial Spondyloarthritis Int Federat ASIF, London, England
[7] Cardiff Univ, Cardiff, Wales
[8] Cyprus League People Rheumatism CYLPER, Nicosia, Cyprus
[9] Mumbai Arthrit Clin, Mumbai, India
[10] IdiPAZ, Hosp Univ La Paz, Madrid, Spain