- adequate liver (serum bilirubin < 1.5 times the upper normal limit (UNL); AST and ALT < 2.5 times the UNL in the absence of demonstrable liver metastases, or < 5 times the UNL in the presence of liver metastases); adequate renal function (serum creatinine < 1.5 times the UNL); and bone marrow (neutrophils ≥ 1.5x 109 /L, and platelets ≥ 100x 109 /L) function