1. Department of Internal Medicine, The Catholic University of Korea, College of Medicine, Seoul, Korea.
2. WHO Collaborating Center for Reference and Research on Viral Hepatitis, Seoul, Korea.
3. Hepatology Center, Bundang Jesaeng General Hospital, Seongnam, Korea.
4. Department of Clinical Molecular Informative Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.