Q. A 3-year-old boy of Mediterranean descent has been brought to the emergency department by his mother with complaints of dark urine, jaundice, and fatigue for the past two days. His mother reports no significant medical history but mentions that he consumed fava beans 2 days ago. His temperature is 98.4°F (36.8°C), heart rate is 90/min, respiratory rate is 14/minute, and blood pressure is 110/70 mm of Hg. On physical examination, scleral icterus is noted. The rest of the examination is unremarkable. Laboratory results are shown below. The peripheral blood smear shows bite cells and Heinz bodies. What is the most appropriate next step in this patient's management?