8. History or clinical evidence of hepatic disease and/or previous clinically significant laboratory abnormalities of liver function parameters. All subjects with bilirubin, gamma glutamyl transferase (GGT), alanine transaminase (ALT), and aspartate transaminase (AST) outside the normal laboratory reference range at screening and baseline, that are regarded by the Investigator as clinically significant. Subjects known to have experienced elevated liver enzyme values in previous clinical studies will also be excluded.