1. Department of Tumor and Diagnostic Pathology, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan.
2. Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
3. Division of Breast Surgery, New-wa-kai Oikawa Hospital, Fukuoka, Japan.
4. Biostatics Section, Division of Scientific Data Registry, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan.
5. Department of Pathology, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan.
6. Department of Surgery, Kuma Hospital, Kobe, Japan.
7. Department of Diagnostic Pathology and Cytology, Kuma Hospital, Kobe, Japan.