title: Letter: Incidence of idiopathic venous thromboembolism in nurses.
mesh_terms: D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D009726:Nurses; D010690:Phlebography; D013923:Thromboembolism / Q000453:epidemiology*
chemical_list: D003276:Contraceptives, Oral