Endoscopic treatnent of biliary-tract diseases.
D000368:Aged; D014670:Ampulla of Vater / Q000601:surgery*; D003972:Diathermy / Q000379:methods*; D004724:Endoscopy; D005069:Evaluation Studies as Topic; D042882:Gallstones / Q000601:surgery*; D006801:Humans; D009803:Sphincter of Oddi / Q000601:surgery*