Additional file 2: of Clinical features of children with enthesitis-related juvenile idiopathic arthritis / juvenile spondyloarthritis followed in a French tertiary care pediatric rheumatology centre
Figure S1. Evolution of the prevalence of inflammatory back pain. Inflammatory back pain was defined as proposed by the ASAS in 2009 [39]. Insidious onset. Improvement with exercise. No improvement with rest. Pain at night. (DOCX 63Â kb