1. Department of Obstetrics and Gynecology, Shimane University School of Medicine, 6938501, Izumo, Japan
2. Department of Organ Pathology, Shimane University School of Medicine, 6938501, Izumo, Japan
3. Division of Carcinogenesis and Cancer Prevention, National Cancer Center Research Institute, 1040045, Tsukiji, Chuo-ku, Japan