Quantification of hepatitis C virus (HCV) RNA levels in plasma, peripheral blood mononuclear cells (PBMC) and liver tissue: Gary A Abrams, University of Alabama at Birmingham, Liver Center, Birmingham, AL; Victoria A Johnson, Clinton D Nail, University of Alabama at Birmingham, Infectious Diseases, Birmingham, AL; Nirag C Jhala, University of Alabama at Birmingham, Clinical Pathology, Birmingham, AL; Michael B Fallon, Brendan M McGuire, Joseph R Bloomer, Miguel Arguedas, Dirk J Van Leeuwen, University of Alabama at Birmingham, Liver Center, Birmingham, AL