Endoscopic cannulation of the ampulla of vater: a preliminary report.
D014670:Ampulla of Vater / Q000000981:diagnostic imaging*; D003287:Contrast Media; D019723:Endoscopes; D006801:Humans; D008722:Methods; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging*; D011859:Radiography
D003287:Contrast Media