1. US General Accounting Office. Referrals to physician-owned imaging facilities warrant HCFA’s scrutiny (report to the Chairman, Subcommittee on Health, Committee on Ways and Means, House of Representatives) (GAO/HEHS-95-2). Washington, District of Columbia: US General Accounting Office; 1994.
2. Frequency and costs of diagnostic imaging in office practice—a comparison of self-referring and radiologist-referring physicians;Hillman;N Engl J Med,1990
3. Imaging self-referral associated with higher costs and limited impact on duration of illness;Hughes;Health Aff (Millwood),2010
4. Physicians’ utilization and charges for outpatient diagnostic imaging in a Medicare population;Hillman;JAMA,1992
5. Medicare Part B imaging services—rapid spending growth and shift to physician offices indicate need for CMS to consider additional management practices (report to congressional requesters) (GAO-08-452),2008