1. Department of Dermatology, Faculty of Medicine, Oita University, Yufu, Japan.
2. Department of Medical Oncology and Hematology, Faculty of Medicine, Oita University, Yufu, Japan.
3. Department of Gastroenterology, Faculty of Medicine, Oita University, Yufu, Japan.
4. Department of Diagnostic Pathology, Faculty of Medicine, Oita University, Yufu, Japan.