title: Oral contraceptives without prescription.
authors.forename: A
authors.initials: A
authors.lastname: de Boer
authors.forename: R M
authors.initials: RM
authors.lastname: Herings
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D004347:Drug Interactions; D005260:Female; D006801:Humans; D004366:Nonprescription Drugs / Q000009:adverse effects*
chemical_list: D003276:Contraceptives, Oral; D004366:Nonprescription Drugs