Changes in hypervariable region 1 after interferon therapy of patients with chronic hepatitis C and in antibody titers against a synthetic peptide based on a deduced sequence from isolated HCV: Motoharu Tanaka, Tane General Hospital, Osaka Japan; Shuhei Nishiguchi, Masaru Enomoto, Osaka City University, Osaka Japan; Hiroko Kurooka, Tane General Hospital, Osaka Japan; Akihiro Tamori, Daiki Habu, Tadashi Takeda, Susumu Shiomi, Shuichi Seki, Shuzo Otani, Osaka City University, Osaka Japan; Naoki Tohdoh, Sumitomo Pharmaceuticals Research Center, Osaka Japan; Noriyuki Tatsumi, Osaka City University, Osaka Japan