3 yo previously healthy male with h/o upper respiratory infection (few weeks) presented with acute onset of abdominal pain, leg pain, vomiting, diarrhea, and dark urine following recent antibiotic use. CBC: wbc 27 K/uL, Hb 10g/dL, plt 111K/uL. Increased BUN/Cr. Increased bilirubin (direct/indirect), AST. Ultrasound showed mild hepatosplenomegaly. The peripheral blood smear showed the following findings.