The Assessment of SpondyloArthritis International Society (ASAS) Consensus-Based Expert Definition of Difficult-to-Manage, including Treatment-Refractory, Axial Spondyloarthritis

Denis Poddubnyy, Victoria Navarro‐Compán, Murat Torğutalp, Suzanne Arends, Sibel Zehra Aydın, Simone Battista, Filip Van den Bosch, Christine Bundy, Alberto Cauli, J. Davies, Maxime Dougados, Mehmet Tuncay Duruöz, Bassel Elzorkany, Warren Fong, F. van Gaalen, Rodrigo García Salinas, Marco Garrido‐Cumbrera, Pál Géher, Lianne S. Gensler, Simeon Grazio, Feng Huang, Mitsumasa Kishimoto, Robert Landewé, Ying Ying Leung, Pedro Machado, Helena Marzo‐Ortega, Bhowmik Meghnathi, Anna Moltó, Elena Nikiphorou, Sofía Ramiro, Martín Rudwaleit, Carla Gonçalves Schahin Saad, Alexandre Sepriano, James Cheng‐Chung Wei, Xenofon Baraliakos, Désirée van der Heijde