1. Department of Pathology, Tachikawa General Hospital, Nagaoka, Niigata, Japan
2. Department of of Gastroenterology, Tachikawa General Hopspital, Nagaoka, Niigata, Japan
3. Department of Radiology, Tachikawa General Hospital, Nagaoka, Niigata, Japan
4. Department of Dermatology, Niigata University Medical and Dental Hospital, Niigata City, Niigata, Japan
5. Health Examination Center, Nagaoka Central General Hospital, Nagaoka, Niigata, Japan
6. Histopathology Core Facility, Niigata University School of Medicine, Niigata City, Niigata, Japan
7. Department of Pathology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
8. Department of General Medicine, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
9. Department of Pathology, Okayama University, Okayama City, Okayama, Japan