Leukemia patient with multiple infection

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A 63-years-old leukaemia patient presented with a 6-day history of tiredness, decreased oral intake, nausea, vomiting, and jaundice (dark urine and yellowish sclera). Is there any biochemical test should be conducted except liver function test, complete blood count and G6PD test? I think the patient is having hepatitis or autoimmune hemolytic anaemia due to chemotherapy.