Fig. 1From: Nonradiographic axial spondyloarthritis: clinical and therapeutic relevanceASAS classification criteria for axial spondyloarthritis. Published with permission from [9]. ASAS Assessment of SpondyloArthritis International Society, CRP C-reactive protein, HLA human leukocyte antigen, MRI magnetic resonance imaging, NSAIDs nonsteroidal anti-inflammatory drugs, SpA spondyloarthritisBack to article page