6Juan, J Alerti-Flor. The difficualt duodonal polypectomy. Am-J-Gastroenterol, 1994,89(7)∶1121-1125.
7Sherman S, Ruffolo TA, Hawes RH, et al. Complications of endoscopic sphincterotomy:a prospective series with emphasis on increased risk associated with sphincter of Oddi dysfunction and nondilatated bile ducts. Gastroenterology, 1991,101(5)∶1068-1075.
8Komatsu Y, Kawabe J, Toda N, et al. Endoscopic papillary ballon dilation for the management of common bile duct stones: experience of 226 cases. Endoscopy, 1998, 30(1)∶12-17.
9Cremer M, Deviere J, Engelholm L. Endoscopic management of cysts and pseudocysts in chronic pancreatitis: long term follow up after 7 years of experience.Gastrointest Endosc, 1989, 35(1)∶1-9.
10Huibregtse K, Carr-Locke DL, Cremer M, et al. Biliary stent occlusion-a problem solved with self-expanding metal stents? Endoscopy, 1992, 24(2)∶391-394.
