COURSES 1, 3, and 5 (O-HyperCVAD): Patients receive ofatumumab intravenously (IV) on day 1, cyclophosphamide IV over 2 hours every 12 hours for 6 doses on days 3-5, doxorubicin hydrochloride IV continuously over 72 hours on days 6-8, vincristine sulfate IV on days 6 and 13, and dexamethasone IV or orally (PO) on days 3-6 and 13-16.