1 Autoimmune Hepatitis Study Group, Subgroup of the Intractable Hepato-Biliary Disease Study Group in Japan, Tokyo, Japan.
2 Imabari Saiseikai Medical-Welfare Center, Tokyo, Japan.
3 Department of Gastroenterology, Jikei University Graduate School of Medicine, Tokyo, Japan.
4 Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
5 Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.