- Normal organ function at the time of screening: Total bilirubin ≤1.5 x upper limit of normal (ULN); aspartic transaminase (AST) and alanine transaminase (ALT) ≤2.5 x ULN; Serum creatinine ≤1.5 x ULN or creatinine clearance >60 mL/min for patients with creatinine levels above ULN