Overview Efficacy Study of Thymosin alpha1 & Pegylated Interferon-alpha2a to Treat Chronic Hepatitis B Status: Completed Trial end date: 2008-08-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine the optimal treatment duration of antiviral therapy for chronic hepatitis B. Phase: Phase 4 Details Lead Sponsor: Seoul National University HospitalCollaborators: Roche Pharma AGSciClone PharmaceuticalsTreatments: Interferon alpha-2Interferon-alphaInterferonsPeginterferon alfa-2aThymalfasin