8. Patients must have adequate hepatic function as documented by a serum bilirubin </=1.5mg/dl, regardless of whether patients have liver involvement secondary to tumor. Alanine aminotransferase (SGPT) and aspartate aminotransferase (SGOT) must be </=2.5x institutional upper limit of normal unless the liver is involved with tumor, in which case levels must be </=5x institutional upper limit of normal.