title: [Slight decrease in the prevalence of smoking around pregnancy].
authors.forename: A
authors.initials: A
authors.lastname: Knol
mesh_terms: D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D011247:Pregnancy; D012907:Smoking / Q000453:epidemiology*; D016540:Smoking Cessation / Q000706:statistics & numerical data*