Extended peginterferon plus ribavirin treatment for 72 weeks versus standard peginterferon plus ribavirin treatment for 48 weeks for patients with chronic hepatitis C virus genotype 1 infection having shown slow antiviral response

Extended peginterferon plus ribavirin treatment for 72 weeks versus standard peginterferon plus ribavirin treatment for 48 weeks for patients with chronic hepatitis C virus genotype 1 infection having shown slow antiviral response