title: Frequency and cost of diagnostic imaging in office practice--a comparison of self-referring and radiologist-referring physicians.
mesh_terms: D000553:Ambulatory Care / Q000191:economics*; D003933:Diagnosis; D006801:Humans; D011859:Radiography / Q000191:economics; D011871:Radiology; D012017:Referral and Consultation; D014481:United States