- Arm I: Patients receive standard chemotherapy comprising cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP). Patients receive cyclophosphamide IV over 30 minutes, doxorubicin IV, and vincristine IV on day 1. Patients receive oral prednisone daily on days 1-5. Treatment repeats every 21 days for 6-8 courses. Patients with bulky disease at diagnosis or residual disease after chemotherapy receive radiotherapy 30-60 days after initiation of the last course of CHOP.