title: [Does the characterization of risk factors improve our understanding on the etiology of rheumatoid arthritis?].
authors.forename: Kimmo
authors.initials: K
authors.lastname: Aho
authors.forename: Markku
authors.initials: M
authors.lastname: Heliövaara
mesh_terms: D001172:Arthritis, Rheumatoid / Q000453:epidemiology* / Q000209:etiology*; D001424:Bacterial Infections; D004032:Diet; D005260:Female; D005387:Finland / Q000453:epidemiology; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D011247:Pregnancy; D011379:Prognosis; D012307:Risk Factors; D012720:Severity of Illness Index; D012907:Smoking