title: Duplex ultrasound in the assessment of lower extremity venous insufficiency.
authors.affiliation: Waikato HospitalVascular LaboratoryHamilton; Tristram ClinicTristram Vascular Ultrasound, Hamilton and Unitec New Zealand; School of HealthPostgraduate Studies - Ultrasound, Waitakere CampusRatanui St, HendersonAucklandNew Zealand.
authors.forename: Martin
authors.initials: M
authors.lastname: Necas