title: Preoperative duplex imaging is required before all operations for primary varicose veins Authors' reply
authors.affiliation: Department of Vascular and Endovascular Surgery, St James's and Seacroft University Hospital NHS Trust, Leeds LS9 7T17, UK.
authors.initials: KG
authors.lastname: Mercer
authors.initials: DJ
authors.lastname: Scott
authors.initials: DC
authors.lastname: Berridge