Compare endoscopic papillary balloon dilatation vs. endoscopic sphincterotomy for bile duct stones in: * when sphincterotomy is difficult (periampullary diverticulum, prior sphincterotomy or Billroth II anastomosis) * when there is distal CBD tapering.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.