Unexplained Fever in a Child

A 3-year-old Japanese boy presents to the emergency department with a 6-day fever and an erythematous rash with edema on both extremities. His mother states that her child has not been well for 6 days and that the fever does not subside with acetaminophen use. Physical examination reveals bilateral conjunctivitis, a red bright tongue and bilateral cervical adenopathy. There is no evidence of tonsillitis or peritonsillar abscess. The mother denies having cough, runny nose, or difficulty breathing the last 5 days. Laboratory work up reveals a white blood cell (WBC) count of 14,000/µl, Hb of 10 gr/dl and a platelet count of 130,000/µl. The patient undergoes an echocardiogram which detects a 5 mm dilatation of the left descending coronary artery (LAD). Treatment with intravenous immunoglobulin and aspirin is immediately initiated. After 5 weeks of treatment with low dose aspirin the LAD dilation resolves completely.

Which of the following would be part of the patient's long term-follow up?

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