- Patients receive induction therapy consisting of vincristine IV on days 1, 8, 15, 22, and 29, oral prednisone 2-3 times daily on days 1-29, cyclophosphamide IV on day 5, doxorubicin IV on days 23-25 and 42, methotrexate intrathecally on days 3, 5, 13, 16, 32, and 34 and GM-CSF subcutaneously or IV over 4 hours beginning from days 7 and 27 and continuing until blood counts recover.