3Drake BB, Arguedas MR, Kilgore ML, et al. Economical andclinical outcomes of alternative treatment strategies in the manag- ement of common bile duct stones in the elderly: wait and see or surgery? [J]. Am J Gastroenterol, 2006, 101(4): 746-752.
4Cheng CL, Sherman S, Watkins JL, et al. Risk factors for post- ERCP pancreatitis: a prospective multicenter study [ J ]. Am J Gastroenterol, 2006, 101(1): 139-147.