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3. Colorectal Cancer Screening: Recommendations for Physicians and Patients from the U.S. Multi-Society Task Force on Colorectal Cancer
4. Cancer treatment and survivorship statistics, 2016
5. History of ACS Recommendations for the Early Detection of Cancer in People Without Symptoms. American Cancer Society website.https://www.cancer.org/healthy/find-cancer-early/cancer-screening-guidelines/chronological-history-of-acs-recommendations.html. Updated May 30 2018. Accessed November 6 2018.