[Commentary on the work of E. J. Williams, pp. 674].
D001660:Biliary Tract Diseases / Q000628:therapy*; D002404:Catheterization; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D006801:Humans; D008297:Male; D010182:Pancreatic Diseases / Q000628:therapy*