6. Patients also had to have adequate organ function (3500 <leukocytes < 12,000/mm3; thrombocytes, >100,000/mm3; total bilirubin,<1.5 mg/dl; AST and ALT, less than twice the normal limits at each institution; BUN, <25 mg/dl; creatinine, less than the normal limits at each institution; and creatinine clearance (Ccr))