Rheumatoid spondylitis: a follow-up study.
D001168:Arthritis; D001172:Arthritis, Rheumatoid; D004194:Disease; D005500:Follow-Up Studies; D006801:Humans; D013122:Spinal Diseases; D013131:Spine; D013167:Spondylitis, Ankylosing
ARTHRITIS, RHEUMATOID; SPINE/diseases