- Adequate liver function: serum bilirubin ≤1.5x Upper limit of normal (ULN); Alanine transaminase/Aspartate transaminase (ALT/AST) ≤2.5x ULN; ALP ≤3x ULN (in the absence of liver metastases). If liver metastases are present, ALT, AST or Alkaline phosphatase (ALP) ≤5x ULN are permitted. Isolated hyperbilirubinaemia due to Gilbert's disease is acceptable