Colonoscopy and Sigmoidoscopy
Written by: Emily Downward | Last reviewed: June 2016.
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- National Institute of Diabetes and Digestive and Kidney Diseases, U.S. Department of Health and Human Services. Accessed on 2/25/16 at http://www.niddk.nih.gov/health-information/health-topics/diagnostic-tests/colonoscopy/Pages/diagnostic-test.aspx and http://www.niddk.nih.gov/health-information/health-topics/diagnostic-tests/flexible-sigmoidoscopy/Pages/diagnostic-test.aspx
- U.S. National Library of Medicine, MedlinePlus. Accessed on 2/25/16 at https://www.nlm.nih.gov/medlineplus/ency/article/003886.htm
- National Cancer Institute, National Institutes of Health. Accessed on 2/26/16 at http://www.cancer.gov/news-events/press-releases/2012/PLCOScreening
- Johns Hopkins Medicine, Johns Hopkins University. Accessed on 2/25/16 at http://www.hopkinsmedicine.org/healthlibrary/test_procedures/gastroenterology/colonoscopy_92,p07693/