High disease activity according to the Ankylosing Spondylitis Disease Activity Score is associated with accelerated radiographic spinal progression in patients with early axial spondyloarthritis: results from the GErman SPondyloarthritis Inception Cohort - Poddubnyy, D; Protopopov, M; Haibel, H (Ann Rheum Dis, 2016)
doi:10.1136/annrheumdis-2016-209209