- Clinically significant laboratory abnormalities, including: Positive Hep B surface antigen or Hep C antibody, Positive HIV test within one year of Study Day 1, Serum alanine aminotransferase (ALT) ≥ 2.0 x ULN, Total bilirubin ≥ 1.2 x ULN (unless evidence of Gilbert's syndrome). Serum creatinine ≥ 2.5mg/dL (or calculated creatinine clearance less than or equal to 30mL/min). Hemoglobin less than or equal to 10g/dL (subject may qualify for the study following diagnosis and treatment of anemia, if the anemia is due to iron and/or vitamin deficiency).