title: Critique of a Danish cohort study on hormonal contraception and VTE.
authors.forename: Ojvind
authors.initials: O
authors.lastname: Lidegaard
mesh_terms: D015982:Bias; D015331:Cohort Studies; D015986:Confounding Factors, Epidemiologic; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D003718:Denmark; D005260:Female; D006801:Humans; D018570:Risk Assessment; D054556:Venous Thromboembolism / Q000139:chemically induced*
chemical_list: D003278:Contraceptives, Oral, Hormonal