Some patients in this study, with changes in certain genes will receive different chemotherapy drugs than other patients in the study will. The patients will, like all the other patients, receive rituximab and interferon. But instead of the FND chemotherapy regimen, they will receive a sequence of three regimens, CHOD-Bleo, ESHAP, and NOPP. The drugs in these regimens include: cyclophosphamide, doxorubicin, vincristine, bleomycin, VP-16, Ara-C, cisplatin, mitoxantrone, procarbazine, and corticosteroids (prednisone, methylprednisolone, dexamethasone).