Dexamethasone 12 mg/m2 (std/high risk) or 8 mg/m2 (low risk) PO daily (tid) x 5 days, Days 1-5 Doxorubicin 30 mg/m2 IV, Day 1 Vincristine 2.0 mg/m2 IV push (max. 2 mg), Day 1 Mercaptopurine 50 mg/m2 PO daily x 7 days (std/high risk), Days 1-7 75 mg/m2 PO daily x 7 days (low risk), Days 1-7 L-asparaginase 25,000 Unit/m2 IM, Day 1 Methotrexate 40 mg/m2 IV or IM, Day 1