title: 533 Patients with ankylosing spondylitis, seen and followed in the period 1948 to 1971.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013167:Spondylitis, Ankylosing / Q000453:epidemiology* / Q000235:genetics / Q000532:radiotherapy