- Laboratory test results: liver enzymes (aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma glutamyl transferase (GGT) and alkaline phosphatase) must be within 1.5 times the upper limit of normal range (ULN), total bilirubin <=1.0 ULN, serum creatinine <1.5 mg/dL (must be available at Baseline).