1. Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Japan
2. Department of Urology, Kanagawa Cancer Center, Yokohama, Japan
3. Department of Breast and Thyroid Surgery, Yokohama City University Medical Center, Yokohama, Japan
4. Department of Surgery, Yokohama City University School of Medicine, Yokohama, Japan