Interim analysis from TRIC-1 a study of metformin with peginterferon alfa-2a and ribavirin in treatment naive genotype 1 chronic hepatitis C with insulin resistance - Romero-Gomez, M; Diago, M; Andrade, R J; Calleja, J L; Salmeron, J; Fernandez-Rodriguez, C M; Sola, R; Herrerias, J M; Garcia-Samaniego, J; Moreno-Otero, R; Olveira, A; Nunez, O; et al. (Journal Of Hepatology, 2008)