Paediatricsniche
A 12-year-old boy had blood taken during a work-up for recurrent abdominal pain, which has since settled without treatment. He is well, is Tanner stage 3, and has grown 9 cm in the past year. He takes no medicines and there is no jaundice, hepatomegaly, bone pain or limb deformity. Results: alkaline phosphatase 480 U/L (adult reference 30 to 110), gamma-glutamyl transferase 18 U/L (5 to 50), alanine aminotransferase 24 U/L, bilirubin 9 micromol/L, with normal calcium and phosphate. Which one of the following is the most appropriate action?