[Measurement of the extrahepatic bile duct diameter by ERCP in normal Chinese subjects].
D000328:Adult; D000368:Aged; D014670:Ampulla of Vater / Q000033:anatomy & histology; D044466:Asian People; D001652:Bile Ducts / Q000033:anatomy & histology*; D002681:China; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged