Zauber AG, Winawer SJ, O'Brien MJ et al : Colonoscopic polypectomy and long-term prevention of colorectal-cancer deaths. N Engl J Med 366 : 687-696, 2012
British society of gastroenterology. Colonoscopic Polypectomy and Endoscopic Mucosal Resection : A Practical Guide. Available at : http://www.bsg.org.uk/clinical-guidance/endoscopy/colonoscopic-polypectomy-and-endoscopic-mucosal-resection-a-practical-guide.html. Accessed December 8, 2014