title: Prenatal ultrasonography in rural hospitals.
authors.forename: F
authors.initials: F
authors.lastname: Christian
mesh_terms: D002170:Canada; D019317:Evidence-Based Medicine; D005194:Family Practice; D005260:Female; D006300:Health Services Misuse; D006780:Hospitals, Rural; D006801:Humans; D015201:Meta-Analysis as Topic; D009774:Obstetrics; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000191:economics / Q000706:statistics & numerical data*