![Baseline and 1-year magnetic resonance imaging of the sacroiliac joint and lumbar spine in very early inflammatory back pain. Relationship between symptoms, HLA-B27 and disease extent and persistence]()
Baseline and 1-year magnetic resonance imaging of the sacroiliac joint and lumbar spine in very early inflammatory back pain. Relationship between symptoms, HLA-B27 and disease extent and persistenceMarzo-Ortega, H; McGonagle, D; O'Connor, P; Hensor, E M A; Bennett, A N; Green, M J; Emery, P · Annals of the Rheumatic Diseases · 2009