Masaru Sakamoto^1,2, Yuki Koike^1,2, Naomi Harano^1,2, Kayo Suzuki^1,2, Ryoko Koike¹, Yasuko Koyamatsu¹, Kenji Umayahara¹, Tadao Tanaka^1,2, Aikou Okamoto² (1.Department of Gynecology, Sasaki Foundation, Kyoundo Hospital, 2.Department of OB/GY, The Jikei University School of Medicine)

Kaoru Abiko¹, Aya Matsumoto², Shunsuke Kawahara², Ryusuke Murakami², Yoshitsugu Chigusa², Ken Yamaguchi¹, Junzo Hamanishi², Masaki Mandai² (1.Department of Obstetrics and Gynecology, National Hospital Organization Kyoto Medical Center, 2.Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine)

Kazuhisa Kitami, Kosuke Yoshida, Satoshi Tamauchi, Yoshiki Ikeda, Nobuhisa Yoshikawa, Kimihiro Nishino, Fumi Utsumi, Kaoru Niimi, Shiro Suzuki, Hiroaki Kajiyama, Fumitaka Kikkawa (Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine)

Zenta Yamanaka, Tetsuya Moritake, Hiroe Ito, Keiichi Isaka, Hirotaka Nishi (Tokyo Medical University)