National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine treatment outcome research support non-u.s. gov't adult female male middle aged Comparative Study Antibodies Multicenter Study DNA viral / blood controlled clinical trial drug therapy combination dose-response relationship drug antiviral agents / therapeutic use* ribavirin / therapeutic use* taiwan hepatitis b / immunology recombinant proteins viral load hepacivirus / immunology hepatitis c / immunology antiviral agents / adverse effects interferon alpha-2 interferon-alpha / adverse effects interferon-alpha / therapeutic use* polyethylene glycols / adverse effects polyethylene glycols / therapeutic use* ribavirin / adverse effects hepatitis c / complications* hepatitis c / drug therapy* pmid:19084016 doi:10.1053/j.gastro.2008.10.049 chun-jen liu wan-long chuang ding-shinn chen hepatitis b / complications* hepatitis b / drug therapy* hepatitis b virus / immunology viral interference / physiology