PATIENT CHARACTERISTICS: Age: 18 to 70 Performance status: ECOG 0-3 Hematopoietic: WBC at least 4,000/mm3 Platelet count at least 120,000/mm3 Hepatic: Bilirubin no greater than 2 times normal AST no greater than 2 times normal Renal: Creatinine no greater than 1.5 times normal Cardiovascular: No heart failure No uncontrolled arrhythmia Pulmonary: No severe pulmonary failure Other: No serious uncontrolled infection No active bleeding No AIDS or HIV-positive serology No prior organ transplant No pregnant or nursing women Negative pregnancy test required of fertile women Adequate contraception required of fertile patients