[1] Univ Seville, Hlth & Terr Res HTR, Seville, Spain
[2] Hosp Univ La Paz, IdiPaz, Madrid, Spain
[3] Cardiff Univ, Sch Healthcare Sci, Cardiff, Wales
[4] Novartis Pharma AG, Patient Engagement, Basel, Switzerland
[5] Axial Spondyloarthrit Int Federat ASIF, London, England
[6] Cyprus League Rheumatism CYPLAR, Nicosia, Cyprus
[7] Spanish Federat Spondyloarthrit Assoc CEADE, Madrid, Spain
[8] Charite Univ Med Berlin, Rheumatol Dept, Berlin, Germany