PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 2.0 mg/dL Transaminases no greater than 3 times normal Renal: Creatinine no greater than 2.0 mg/dL OR Creatinine clearance greater than 60 mL/min Cardiovascular: No cardiomyopathy No symptomatic congestive heart failure Other: No concurrent active malignancy No pregnant or nursing women