title: Cooccurrence of rheumatoid arthritis and ankylosing spondylitis.
authors.forename: S M
authors.initials: SM
authors.lastname: Helfgott
authors.forename: G
authors.initials: G
authors.lastname: Lazarides
authors.forename: J
authors.initials: J
authors.lastname: Sandberg-Cook
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications*; D006801:Humans; D008297:Male; D013167:Spondylitis, Ankylosing / Q000150:complications*