title: Smoking in pregnancy.
authors.forename: M L
authors.initials: ML
authors.lastname: Martínez-Frías
authors.forename: A
authors.initials: A
authors.lastname: Cereijo
authors.forename: E
authors.initials: E
authors.lastname: Rodríguez-Pinilla
mesh_terms: D000328:Adult; D004522:Educational Status; D005260:Female; D006801:Humans; D011247:Pregnancy; D012907:Smoking / Q000453:epidemiology*; D013030:Spain / Q000453:epidemiology