title: Determination of smoking status of rheumatoid arthritis patients by means of a self-reported questionnaire and serum cotinine assay: a cross-sectional study.
authors.forename: Kamran
authors.initials: K
authors.lastname: Naraghi
authors.forename: Mark
authors.initials: M
authors.lastname: Booth
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Russell
authors.forename: Jacob M
authors.initials: JM
authors.lastname: van Laar
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000209:etiology*; D015415:Biomarkers / Q000097:blood; D003367:Cotinine / Q000097:blood*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012650:Self Disclosure; D012907:Smoking / Q000009:adverse effects*
chemical_list: D015415:Biomarkers; D003367:Cotinine