484 PREDICTORS OF SUSTAINED VIROLOGIC RESPONSE AMONG GENOTYPE 1 PREVIOUS NON-RESPONDERS AND RELAPSERS TO PEGINTERFERON/RIBAVIRIN WHEN RE-TREATED WITH BOCEPREVIR PLUS PEGINTERFERON ALFA-2B/RIBAVIRIN - Zeuzem, S.; Vierling, J.M.; Esteban, R.; Gibas, A.L.; Pol, S.; Boparai, N.; Burroughs, M.; Brass, C.A.; Albrecht, J.K.; Poordad, F. (Journal of Hepatology, 2011)