Rei Gou, Yukio Yamanishi, Junichi Aratake, Kaori Yamada, Nanayo Sasagasako, Yoshihide Inayama, Atsuko Kawamura, Megumi Yamanishi, Kenzo Kosaka (Shizuoka General Hospital, Shizuoka, Japan)

Kazuma Onishi^1,2, Mizuki Kurihara¹, Makiko Hiramatsu¹, Ikumo Tanaka¹, Megumi Kato¹, Noriko Odani¹, Yukiko Egawa¹, Yoshikazu Ichikawa¹, Taiko Nemoto¹, Kazuhiro Tashiro³ (1.The department of obstetrics and gynecology, Japanese Red Cross Shizuoka Hospital, Shizuoka, Japan, 2.The department of obstetrics and gynecology, Japanse Red Cross Nagoya Daiichi Hospital, Aichi, Japan, 3.The department of pathology, Japanese Red Cross Shizuoka Hospital)

Yasushi Tsuji¹, Kaho Tokuchi¹, Satoko Shindo¹, Toshizo Takayama¹, Rio Honma¹, Hiina Minami², Ryoichi Tanaka² (1.Department of Medical Oncology, Tonan Hospital, Sapporo, Japan, 2.Department of Gynecology, Tonan Hospital, Sapporo, Japan)

Kohjiro Tanabe, Azuma Murakawa, Mariya Murakawa, Kaori Nishizawa, Shouhei Tanabe, Naoko Kashiwadate, Rui Matsuura, Nobuko Ishigaki, Youichi Takeyama, Hitoshi Niikura (The Department of Obstetrics and Gynecology, Sendai Medical Center, Sendai, Japan)

Mizuki Kanda, Eiji Kobayashi, Erika Nakatsuka, Satoshi Nakagawa, Tsuyoshi Takiuchi, Yuri Matsumoto, Michiko Kodama, Kae Hashimoto, Yutaka Ueda, Kenjiro Sawada, Takuji Tomimatsu, Tadashi Kimura (Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan)