title: Age and year of onset differences in siblings with rheumatoid arthritis.
authors.forename: C M
authors.initials: CM
authors.lastname: Deighton
authors.forename: D J
authors.initials: DJ
authors.lastname: Walker
mesh_terms: D000367:Age Factors; D001172:Arthritis, Rheumatoid / Q000235:genetics* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male