1. Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Japan
2. Department of Pathology, Kurume University School of Medicine, Japan
3. Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine, Japan
4. Division of Respirology, Neurology, and Rheumatology, Department of Medicine, Kurume University School of Medicine, Japan