1. https://www.acr.org/Clinical-Resources/ACR-Appropriateness-Criteria. Accessed October 21, 2018
2. https://www.acr.org/Clinical-Resources/Practice-Parameters-and-Technical-Standards/Practice-Parameters-by-Modality. Accessed on October 21, 2018
3. The American College of Radiology. ACR appropriateness criteria project;Cascade;Radiology,2000
4. https://www.acr.org/Clinical-Resources/ACR-Appropriateness-Criteria/Overview. Accessed October 21, 2018
5. https://www.acr.org/-/media/ACR/Files/Appropriateness-Criteria/OrgChart.pdf. Accessed October 24, 2018