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