PRIOR CONCURRENT THERAPY: Biologic therapy: No prior peripheral blood stem cell rescue Chemotherapy: See Disease Characteristics At least 1 course of prior chemotherapy At least 4 weeks since prior chemotherapy No prior high-dose chemotherapy Endocrine therapy: Not specified Radiotherapy: At least 4 weeks since prior radiotherapy No prior radiotherapy to more than 30% of red bone marrow Surgery: At least 4 weeks since prior major surgery