title: Chest and spinal movement in ankylosing spondylitis.
mesh_terms: D000367:Age Factors; D001416:Back Pain; D006801:Humans; D009068:Movement; D013131:Spine / Q000503:physiopathology*; D013167:Spondylitis, Ankylosing / Q000175:diagnosis / Q000503:physiopathology*; D013909:Thorax / Q000503:physiopathology*; D013997:Time Factors