1. Department of Obstetrics and Gynecology Yokohama City University Graduate School of Medicine Yokohama Japan
2. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology Columbia University Vagelos College of Physicians and Surgeons New York New York USA
3. Department of Pathology Yokohama City University Hospital Yokohama Japan
4. Pathology Center GeneticLab Co., Ltd. Sapporo Japan