Guidance for endoscopy^W contrast retrograde:Find:Pt:Abdomen>Biliary ducts+pancreatic duct:Doc:RF
guidance for endoscopy^w contrast retrograde:find:pt:abdomen>biliary ducts+pancreatic duct:doc:rf
RF Guidance for endoscopy of Biliary ducts and Pancreatic duct-- W contrast retrograde
rf guidance for endoscopy of biliary ducts and pancreatic duct-- w contrast retrograde