Assertion: gallstone | /r/AtLocation | the bile ducts
Facets:
Source sentences:
text: If gallstones are in the bile ducts, the doctor may use endoscopic retrograde cholangiopancreatography (ERCP) to locate and remove them before or after the gallbladder surgery.
text: If gallstones are found to be in the bile ducts, the gastroenterologist may use endoscopic retrograde cholangiopancreatography (ERCP) to locate and remove the stones before or during gallbladder surgery.