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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 37-year-old woman presents to the emergency department with right upper quadrant (RUQ) pain. She reports that the pain is not new and usually starts within half an hour of eating a meal. The pain has been previously diagnosed as biliary colic, and she underwent a cholecystectomy three months ago for symptomatic biliary colic. Her liver reportedly looked normal at that time. The patient dates the onset of these episodes to shortly after she underwent a sleeve gastrectomy several years ago, and the episodes were more severe immediately following that surgery. Her postsurgical course was otherwise uncomplicated, and she has lost fifty pounds since then. She has a past medical history of hypertension, hyperlipidemia, diabetes mellitus, osteoarthritis, and obesity. She denies alcohol or tobacco use. Her home medications are hydrochlorothiazide, enalapril, atorvastatin, and vitamin supplements. RUQ ultrasound reveals a surgically absent gallbladder and a dilated common bile duct without evidence of stones. Magnetic resonance cholangiopancreatography (MRCP) shows no evidence of biliary compression or obstruction, and endoscopic retrograde cholangiopancreatography (ERCP) shows no evidence of biliary stones or sludge. Laboratory tests are performed which reveal the following:

ALT: 47 U/L
AST: 56 U/L
Alkaline phosphatase: 165 U/L
Total bilirubin: 1.6 g/dL
Amylase: 135 U/L
Lipase: 160 U/L

Which of the following is definitive treatment of this patient's condition?
assistant
Sphincterotomy