title: New Zealand sonographers do not outperform their European or American colleagues in the knowledge of ultrasound safety.
authors.affiliation: Waikato HospitalDepartment of Ultrasound, Hamilton and UnitecNew Zealand; School of HealthPostgraduate Studies - Ultrasound, Waitakere CampusAucklandNew Zealand.
authors.forename: Martin
authors.initials: M
authors.lastname: Necas