Clinical features and course of ankylosing spondylitis; as seen in a follow-up of 222 hospital referred cases.
D000844:Ankylosis; D005500:Follow-Up Studies; D006801:Humans; D012017:Referral and Consultation; D013166:Spondylitis; D013167:Spondylitis, Ankylosing
SPONDYLITIS, ANKYLOSING