7. Adequate liver, renal, and bone marrow function, defined as: a total bilirubin value </= 1.5 mg/dL; serum glutamic pyruvic transaminase (SGPT) </= 2 times upper limit of normal or </= 5 times upper limit of normal when liver metastases are present; serum creatinine </= 1.5 mg/dL; Absolute neutrophil count (ANC) >/= 1,500/ul; platelet count >/= 100,000/ul. All qualifying laboratory parameters must be determined within 1 week prior to first treatment.