- Subjects receiving CHOEP ((CHOP = Cytoxan, Hydroxyrubicin (Adriamycin), Oncovin (Vincristine),Etoposide, Prednisone Chemotherapy )or CNOP (Cytoxan, Novantrone, Oncovin (Vincristine),Etoposide, Prednisone) chemotherapy are not eligible for inclusion in this study