1. Division of Metabolism and Biosystemic Science, Gastroenterology, and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Hokkaido, Japan
2. Department of Dermatology, Asahikawa Medical University, Asahikawa, Hokkaido, Japan
3. Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Asahikawa Medical University, Asahikawa, Hokkaido, Japan