- Evaluate whether chemotherapy alone is as effective, but less toxic, as combined modality treatment, in terms of progression-free survival (PFS), in patients with favorable or unfavorable supradiaphragmatic stage I or II Hodgkin's lymphoma who are fludeoxglucose F 18 positron emission tomography (FDG-PET) scan negative after two courses of doxorubicin hydrochloride, bleomycin, vinblastine, and dacarbazine (ABVD).