Q. A 52-year-old woman with no significant medical history comes to the physician's clinic with complaints of recurrent episodes of upper abdominal pain that radiates to her back. The pain is associated with nausea and occurs about 30 minutes after eating fatty meals. She denies fever, vomiting, or changes in bowel habits. On examination, the physician found mild epigastric tenderness but no rebound tenderness or guarding. Lab tests, including liver function tests, are normal, but ultrasound reveals gallstones. What is the most appropriate next step in the management of this patient?