TY - CONF AU - Suárez Sambade, María Dolores PY - 2012 SN - 0270-9139 UR - http://hdl.handle.net/20.500.11940/7222 LA - eng TI - Influence of il-28b genotype on efficacy of retreatment with pegifn alfa-2a and ribavirin in patients with chc and failure of previous treatment (agora study):Results at week 12 VL - 56 ER -