1. American Cancer Society 2016 Colorectal Cancer Facts & Figures 2014-2016 http://www.cancer.org/research/cancerfactsstatistics/colorectal-cancer-facts-figures
2. Cancer statistics, 2014;Siegel;CA: A Cancer Journal for Clinicians,2014
3. Vital Signs: Colorectal Cancer Screening Test Use-United States, 2012;Centers for Disease Control and Prevention (CDC);Morbidity and Mortality Weekly Report (MMWR),2013
4. U.S. Preventive Services Task Force 2016 http://www. uspreventiveservicestaskforce.org/recommendations. htm