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2. Cigarette smoking increases the risk of rheumatoid arthritis. Results from a nationwide study of disease-discordant twins;Silman,1996
3. A gene-environment interaction between smoking and shared epitope genes in HLA-DR provides a high risk of seropositive rheumatoid arthritis;Padyukov,2004
4. A new model for an etiology of rheumatoid arthritis: smoking may trigger HLA-DR (shared epitope)-restricted immune reactions to autoantigens modified by citrullination;Klareskog,2006