1. Department of Radiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
2. Department of Surgery 1, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
3. Department of Pathology and Oncology, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
4. Department of Pathology and Cell Biology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
5. Department of Surgery 2, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan