title: Authors' reply to Costescu and Waddington.
authors.forename: Frits R
authors.initials: FR
authors.lastname: Rosendaal
authors.forename: Frans M
authors.initials: FM
authors.lastname: Helmerhorst
mesh_terms: D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D005260:Female; D006801:Humans; D013927:Thrombosis / Q000139:chemically induced*
chemical_list: D003278:Contraceptives, Oral, Hormonal