- Aspartate aminotransferase (AST), alanine aminotransferase (ALT) and total bilirubin (TBil) must not be above the normal range. If the Screening test result for AST, ALT, or TBil is > 1 x ULN, but < 1.5 x ULN the assessment may be repeated once during the screening period and on day -1. If the repeat assessment is above the ULN, the subject is not eligible. If the AST, ALT, or TBil test result at Screening is > 1.5 x ULN, it cannot be repeated, and the subject is not eligible.