Smoking and rheumatoid arthritis--observations from a multicase family study: comment on the article by Silman et al.
McDonagh
J E
JE
Walker
D J
DJ
D001172:Arthritis, Rheumatoid / Q000209:etiology*; D004200:Diseases in Twins / Q000209:etiology*; D006801:Humans; D012907:Smoking / Q000009:adverse effects*