1. Winawer SJ, Zauber AG, Ho MN, et al. The National Polyp Study Workgroup. Prevention of colorectal cancer by colonoscopic polypectomy. N Engl J Med. 1993. 329:1977–1981.
2. Watabe H, Yamaji Y, Okamoto M, et al. Risk assessment for delayed hemorrhagic complication of colonic polypectomy: polyp-related factors and patient-related factors. Gastrointest Endosc. 2006. 64:73–78.
3. Sawhney MS, Salfiti N, Nelson DB, Lederle FA, Bond JH. Risk factors for severe delayed postpolypectomy bleeding. Endoscopy. 2008. 40:115–119.
4. Heldwein W, Dollhopf M, Rösch T, et al. The Munich Polypectomy Study (MUPS): prospective analysis of complications and risk factors in 4000 colonic snare polypectomies. Endoscopy. 2005. 37:1116–1122.
5. Bae GH, Jung JT, Kwon JG, et al. Risk factors of delayed bleeding after colonoscopic polypectomy: case-control study. Korean J Gastroenterol. 2012. 59:423–427.
6. Lee SH, Shin SJ, Park DI, et al. Multi-Society Task Force for Development of Guidelines for Colorectal Polyp Screening, Surveillance and Management. Korean guidelines for colonoscopic polypectomy. Korean J Gastroenterol. 2012. 59:85–98.