title: Quantification of training in obstetrical ultrasound.
authors.forename: T J
authors.initials: TJ
authors.lastname: Barloon
mesh_terms: D004502:Education, Medical, Continuing; D005194:Family Practice / Q000193:education*; D005260:Female; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal