6. Patients must have adequate bone marrow function as evidenced by an absolute neutrophil count >/=1,500/microliters and a platelet count >/=100,000/microliter, adequate renal function as evidenced by serum creatinine </=2.0 mg/dL, adequate hepatic function as evidenced by serum total bilirubin </=2.0 mg/dL, AST/serum glutamate oxaloacetate transaminase (SGOT) and ALT/serum glutamate pyruvate transaminase (SGPT) </= 3X the upper limit of normal (ULN).