[1] Charite Univ Med Berlin, Dept Gastroenterol Infect Dis & Rheumatol, Berlin, Germany
[2] Sanatorio Julio Mendez, Buenos Aires, DF, Argentina
[3] IdiPaz, La Paz Univ Hosp, Dept Rheumatol, Madrid, Spain
[4] Cardiff Univ, Cardiff, Wales
[5] Cyprus League People Rheumatism CYLPER, Nicosia, Cyprus
[6] Mumbai Arthrit Clin, Mumbai, Maharashtra, India
[7] Spondyloarthritis Assoc Norwary SPAFO, Oslo, Norway
[8] Axial Spondyloarthritis Int Federat ASIF, Oslo, Norway
[9] Canadian Spondylitis Assoc CSA, Toronto, ON, Canada
[10] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[11] Novartis Pharma AG, Basel, Switzerland
[12] Univ Seville, Seville, Spain