13. Adequate hepatic function: total bilirubin ≤ upper limit of normal [ULN], alanine aminotransferase [ALT] ≤ 1.5 x ULN, aspartate aminotransferase [AST] ≤ 1.5 x ULN). ALT and AST ≤ 5x ULN if documented liver metastases