1. Division of Metabolism and Biosystemic Science, Gastroenterology, and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, 2-1 Midorigaoka-Higashi, Asahikawa 078-8510, Japan
2. Department of Diagnostic Pathology, Asahikawa Medical University Hospital, 2-1 Midorigaoka-Higashi, Asahikawa 078-8510, Japan
3. Department of Radiology, Asahikawa Medical University, 2-1 Midorigaoka-Higashi, Asahikawa 078-8510, Japan