1. Issues in the growth of diagnostic imaging services: a case study of cardiac imaging. Executive summary,2005
2. Report to the Congress,2005
3. Medical technology as a driver of healthcare costs,2003
4. Referrals to physician-owned imaging facilities warrant HCFA’s scrutinyreport to the U.S. House of Representatives,1994
5. Frequency and costs of diagnostic imaging in office practice—a comparison of self-referring and radiologist-referring physicians;Hillman;N Engl J Med,1990