4Heldwein W, Dollhopf M, Rosch T, et al. The munich polypectomy study(MUPS): prospective analysis of complications and risk factors in 4000 colonic snare polypectomies[J], oseopy, 2005,37(11): 1116-1122.
5Winawer S J, Zauber AG, Ho MN, et al. Prevention of colorectal cancer by colonoscopic polypectomy[J]. N Engl j med, 1993, 329(27): 1977-1983.
6Van GA, Cozzoli A, Adler M, et al. Colonoscopic snare polypectomy analysis of 1485 resections comparing two types of current[J]. Gastronintest Edosc, 1992, 38 (4) : 472-475.
7Bond JH. Polyp guideline: diagnosis, treatment, and surveillance for patients with colorectal polyps[J]. Am J Gastroentorol, 2000, 95 ( 11 ) : 3053-3063.
8Lebwohl B, Deckelbaum R J, Green PH. Giardiasis [J]. Gastrointest Endosc ,2003,57 (7) :906-913.
9Feldman M, Friedman KS, Sleisenger MH. Gastrointestinal and liver diseases. 7th ed. Philadelphia: Saunder ,2004:131.
