1. Hepatitis Information Center, Research Center for Hepatitis and ImmunologyNational Center for Global Health and Medicine Ichikawa Japan
2. Department of Gastroenterology and HepatologyKumamoto Rosai Hospital Yatsushiro Japan
3. Department of Gastroenterology and Hepatology, Graduate School of Medical SciencesKumamoto University Kumamoto Japan
4. Department of Hepatobiliary and PancreatologySaga‐Ken Medical Center Koseikan Saga Japan
5. Department of Clinical LaboratoryNational Center for Global Health and Medicine Shinjyuku Japan