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ObjectiveTo evaluate the generation of rheumatoid arthritis (RA)–related autoantibodies in the lung.
MethodsSimultaneous collection of serum and induced sputum was performed in 21 healthy controls, 49 at‐risk subjects without inflammatory arthritis but at risk of RA due to family history or seropositivity for anti–citrullinated protein antibodies, and 14 subjects with early RA. Samples were tested...
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