^○Wen Di^1,2 (1.Department of Gynecology and Obstetrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, 2.Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China)

^○Tsuyoshi Saito, Motoki Matsuura, Masato Tamate, Masahiro Iwasaki, Shinich Ishioka (Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo, Japan)

^○Jung Ryeol Lee^1,2 (1.Department of Obstetrics and Gynecology, Seoul National University College of Medicine, 2.Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Korea)

^○Fuminori Kimura, Tetsuro Hanada, Jun Kitazawa, Aina Morimune, Takashi Murakami (Department of Obstetrics and Gynecology, Shiga University of Medical Science, Shiga, Japan)

^○Seido Takae, Nao Suzuki (Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kanagawa, Japan)