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二级参考文献2
1Kohut M, Nowak A, Nowakowska DE,et al. The frequency of bile duct crystals in patients with presumed biliary pancreatitis. Gastrointestinal Endoscopy, 2001,54:37-41
2Wang HP, Huang SP, Sun MS, et al. Urgent endoscopic nasobiliary drainage without fluoroscopic guidance: A useful treatment for critically ill patients with biliary obstruction. Gastrointestinal Endoscopy, 2000,52:741-744
