1. Department of Internal Medicine, Center for Liver Diseases, Seizankai Kiyokawa Hospital
2. Department of Virology II, National Institute of Infectious Diseases
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kawasaki Municipal Tama Hospital
4. Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine
5. AMS Palace Building Clinic
6. Division of Infectious Diseases, Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo