title: Unnecessary use of ultrasound.
authors.forename: J T
authors.initials: JT
authors.lastname: Zaaijman
mesh_terms: D005251:Fees, Medical; D006801:Humans; D010818:Practice Patterns, Physicians' / Q000191:economics*; D013019:South Africa; D014463:Ultrasonography / Q000191:economics / Q000706:statistics & numerical data*