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Epidemiology. Peak incidence; 30-60 yrPrevalence; 1% (0.3-1.5%)M;F=1;3In 10yrs, half of patients are unable to workGenetic predispositionConcordance rate of monozygotic twin; 15-30%Increase risk of RA in monozygotic and dizygotic twin; relative risk 8 vs 2-3.4. Rheumatologic History. Location
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