1. Department of Internal Medicine; Seoul National University Bundang Hospital; Seongnam Korea
2. Department of Internal Medicine and Liver Research Institute; Seoul National University College of Medicine; Seoul Korea
3. Department of Biological Sciences and Institute of Microbiology; Seoul National University; Seoul Korea
4. Department of Microbiology; College of Medicine; Hanyang University; Seoul Korea
5. NAR Center, Inc.; Daejeon Oriental Hospital of Daejeon University; Daejeon South Korea