1. Department of Tumor and Diagnostic Pathology, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
2. Department of Diagnostic Pathology, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan
3. Department of Diagnostic Pathology, National Hospital Organization Ureshino Medical Center, Nagasaki, Japan
4. Department of Nagasaki Diagnostic Pathology Clinic, Nagasaki, Japan