1. Medicare Payment Advisory Commission (2011) Report to the Congress: Medicare and the health care delivery system. Online report. http://medpac.gov/docs/default-source/reports/Jun11_EntireReport.pdf. Accessed 20 Sep 2020
2. Medicare Payment Advisory Commission (2018) Report to the Congress: Medicare payment policy. Online report. http://www.medpac.gov/docs/default-source/reports/mar18_medpac_entirereport_sec.pdf. Accessed 20 Sep 2020
3. Lee DW, Rawson JV, Wade SW et al (2011) Radiology benefit managers: cost saving or cost shifting? J Am Coll Radiol 8:393–401
4. Centers for Medicare & Medicaid Services (2020) Appropriate use criteria program. https://www.cms.gov/Medicare/Quality-Initiatives-Patient-Assessment-Instruments/Appropriate-Use-Criteria-Program. Accessed 10 Feb 2020
5. C-SPAN (2017) Dr. K.K. Wallace, then chair of the American College of Radiology Board of Chancellors, testifying before the House Ways and Means Committee in 1993. C-SPAN video clip. https://www.c-span.org/video/?c4692308/user-clip-kk-wallace. Accessed 20 Sep 2020