6. Patients should have adequate bone marrow function, as defined by peripheral granulocyte count of >/= 1,000/mm³, and a platelet count of >/= 50,000/mm³.Patients must have adequate liver function with a bilirubin </= 1.5 times the upper limit of normal (ULN). Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) must be </= 2 x the ULN and alkaline phosphatase must be </= 2 x ULN.