- Adequate renal function: Serum creatinine ≤1.5 * upper limit of normal(ULN), or Serum creatinine≥ 50 ml/min. Adequate liver function: Total bilirubin ≤ 2 *ULN and Alanine Aminotransferase (ALT) and Aspartate Aminotransferase (AST)< 2.5 * ULN in the absence of liver metastases, or < 5 * ULN in case of liver metastases.