6. Patients must have normal organ and marrow function as defined below: - leukocytes > or = 3,000/mcL - absolute neutrophil count > or = 1,500/mcL - platelets > or = 100,000/mcL - total bilirubin within normal institutional limits - AST(SGOT)/ALT(SGPT) < or = 2.5 X institutional upper limit of normal - creatinine within normal institutional limits OR - creatinine clearance > or = 60 mL/min/1.73 m2 for patients with creatinine levels above institutional normal