title: Could the use of biochemical validation of smoking abstinence introduce a confound into the interpretation of randomized controlled trials of tobacco cessation?
authors.forename: John Alastair
authors.initials: JA
authors.lastname: Cunningham
authors.forename: Vladyslav
authors.initials: V
authors.lastname: Kushnir
mesh_terms: D015415:Biomarkers / Q000032:analysis*; D015986:Confounding Factors, Epidemiologic; D003627:Data Interpretation, Statistical; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D015203:Reproducibility of Results; D016540:Smoking Cessation / Q000379:methods*; D016896:Treatment Outcome
chemical_list: D015415:Biomarkers