GPT and coinfection: Two additional Cox models examined only the TPV/r patients in RESIST 1 and 2, and compared the risk of DAIDS Grade 3/4 ALT and/or AST elevation in patients who were either HBV/HCV co-infected or who had DAIDS Grade ≥2 for ALT and/or AST at baseline versus those patients who had neither co-infection nor baseline ALT and/or AST elevation.