1. Department of Internal Medicine, Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan
2. Internal Medicine, Heiwadai Hospital, Miyazaki 880-0034, Japan
3. Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan
4. Fujisaki Clinic, Kagoshima 891-0141, Japan
5. Ryutokukai Medical Corp, Tsuruta Hospital, Miyazaki 881-0016, Japan