1. Department of Obstetrics and Gynecology, Tokyo Women's Medical University, Shinjuku, Tokyo 162‑8666, Japan
2. Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Shinjuku, Tokyo 162‑8666, Japan
3. Department of Surgical Pathology, Tokyo Women's Medical University, Shinjuku, Tokyo 162‑8666, Japan