1. Division of Breast Surgery, Saitama Cancer Center, Saitama 362‑0806, Japan
2. Department of Pathology, Saitama Cancer Center, Saitama 362‑0806, Japan
3. Division of Breast Oncology, Saitama Cancer Center, Saitama 362‑0806, Japan
4. Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Gunma 371‑8511, Japan
5. Department of Breast Surgery, International University of Health and Welfare, Narita, Chiba 286‑8686, Japan
6. Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, Maebashi, Gunma 371‑8511, Japan