^○Masayuki Shimada (Graduate School of Integrated Sciences for Life, Hiroshima University, Japan)

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

^○Mitsutoshi Yamada (Department of Obstetrics and Gynecology, Keio University School of Medicine, Japan)

^○Young Sik Choi^1,2, Hyo-Jin Yoon³, Yong Jae Lee^1,2, Sewoom Baek³, Young Shin Chung^1,2, Dae-Hyun Kim³, Jae Hoon Lee^4,5, Yong Cheol Shin³, Young Min Shin³, Chungsoon Ryu¹, Hye-Seon Kim³, So Hyun Ahn^1,2, Heeyon Kim^1,2, Young Bin Won^1,2, Inha Lee^1,2, Myung Jae Jeon⁵, Si Hyun Cho^1,4, Byung Seok Lee^1,2, Hak-Joon Sung³ (1.Institute of Women's Life Medical Science, Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Republic of Korea, 2.Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Republic of Korea, 3.Department of Medical Engineering, Yonsei University College of Medicine, Republic of Korea, 4.Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea, 5.Department of Obstetrics and Gynecology, College of Medicine, Seoul National University, Republic of Korea)