- Adequate liver function: Serum (total) bilirubin ≤ 1.5 ULN. AST, ALT ≤ 2.5 x ULN in patients without liver metastases, ≤ 5 x ULN in patients with liver metastases. Albumin ≥ 2.5 g/dL (Only for patients who will receive AS101).