1. Department of Pathology and Histotechnology, Tohoku University Graduate School of Medicine, Sendai, Miyagi‑ken 980‑8575, Japan
2. Department of Disaster Obstetrics and Gynecology, International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi 980‑8574, Japan
3. Department of Anatomic Pathology, Graduate School of Medicine, Tohoku University, Sendai, Miyagi 980‑8575, Japan
4. Department of Breast and Endocrine Surgical Oncology, Graduate School of Medicine, Tohoku University, Sendai, Miyagi 980‑8575, Japan