1. Department of Pathology Yamaguchi University Graduate School of Medicine Yamaguchi Japan
2. Department of Thoracic Surgery National Hospital Organization Yamaguchi Ube Medical Center Yamaguchi Japan
3. Breast and Gastrointestinal Surgery National Hospital Organization Yamaguchi Ube Medical Center Yamaguchi Japan
4. Department of Diagnostic Pathology Showa University Northern Yokohama Hospital Yokohama Japan
5. Department of Surgery Shunan Memorial Hospital Yamaguchi Japan
6. Department of Clinical Research National Hospital Organization Yamaguchi Ube Medical Center Yamaguchi Japan