1. Department of Breast Surgical Oncology; St. Luke's International Hospital; Tokyo Japan
2. Center for Clinical Epidemiology; St. Luke's Life Science Institute; Tokyo Japan
3. Department of Pathology; St. Luke's International Hospital; Tokyo Japan
4. Department of Breast Surgical Oncology; Showa University School of Medicine; Tokyo Japan
5. Department of Radiology; St. Luke's International Hospital; Tokyo Japan