- Arm I: Patients receive vincristine IV weekly for 8 weeks and then on days 1 and 7 of weeks 11, 14, 17, 20, 23, and 26. Patients also receive dactinomycin IV weekly on weeks 2, 5, 8, 11, 14, 17, 20, 23, and 26 and doxorubicin IV over 4-6 hours weekly on weeks 2, 8, 14, 20, and 26.