title: The interaction of smoking and the HLA-DRB1 shared epitope in rheumatoid factor-positive rheumatoid arthritis: comment on the article by Padyukov et al.
authors.forename: Niek
authors.initials: N
authors.lastname: de Vries
authors.forename: Aeilko H
authors.initials: AH
authors.lastname: Zwinderman
authors.forename: Paul P
authors.initials: PP
authors.lastname: Tak
mesh_terms: D001172:Arthritis, Rheumatoid / Q000209:etiology* / Q000235:genetics* / Q000276:immunology; D000939:Epitopes / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D016015:Logistic Models; D015233:Models, Statistical; D012217:Rheumatoid Factor / Q000097:blood; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*
chemical_list: D000939:Epitopes; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D012217:Rheumatoid Factor