Patients will be followed 6-12 months using the American Society of Clinical Oncology Guidelines and the Surveillance Committee Guidelines. All children will be followed until their adulthood. If the disease gets worse, patients will be treated off the study with individualized therapy. Premedication will be provided for all patients in order to decrease the risks of nausea and vomiting. When needed, adjustment in dosage of chemotherapy or modification in the way the medicines are given will be made in order to decrease any side effects.