Kotaro Inoue¹, Kentaro Kai¹, Saki Aso¹, Shimpei Sato¹, Masakazu Nishida¹, Kaei Nasu², Hisashi Narahara¹ (1.Department of Obstetrics and Gynecology, Oita University Faculty of Medicine, Oita, Japan, 2.Division of Obstetrics and Gynecology, Support System for Community Medicine, Oita University Faculty of Medicine, Oita, Japan)

Hidehiko Akashi, Kosuke Yoshihara, Ryo Tamura, Erina Akashi, Risa Kudo, Miho Suzuki, Tatsuya Ishiguro, Sosuke Adachi, Masanori Isobe, Akiko Kobayashi, Koji Nishino, Masayuki Yamaguchi, Nobumichi Nishikawa, Masayuki Sekine, Takayuki Enomoto (Department of Obstetrics and Gynecology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan)

Makoto Nakabayashi¹, Hidetaka Nomura¹, Emi Ota¹, Kohei Omatsu¹, Yutaka Takazawa², Nobuhiro Takeshima¹ (1.Department of Gynecology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan, 2.Division of Pathology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan)

Tomoka Usami, Takashi Matsumoto, Aya Inoue, Toshiaki Yasuoka, Maki Yokoyama, Yoshiko Aki, Shimon Yukimoto, Kazuyoshi Nakahashi, Akiko Yano, Yuko Matsubara, Toru Fujioka, keiichi Matsubara, Takashi Sugiyama (Ehime University Graduate School of Medicine)

Kentaro Kai¹, Tomoko Hirakawa², Mitsutake Yano³, Tomoko Oishi¹, Satoshi Eto¹, Yuichi Furukawa¹ (1.Department of Obstetrics and Gynecology, Nakatsu Municipal Hospital, Oita, Japan, 2.Department of Obstetrics and Gynecology, Oita University Faculty of Medicine, Oita, Japan, 3.Department of Pathology, Saitama Medical University International Medical Center, Saitama, Japan)