^○Shiori Yanai, Masaaki Andou, Kunitoshi Kinjo, Kouta Sakakibara, Satoki Senba, Yoshihumi Ochi, Mitsuru Toeda, Kei Kato, Kyoko Shimada, Yasunori Yoshino, Michiru Yasui, Shintaro Sakate, Mari Sawada, Kiyoshi Kanno (Kurashiki Medical Center, Japan)

^○Kiyoshi Kanno¹, Shiori Yanai¹, Masaaki Andou^1,3, Amphan Chalermchocharoenkit^2,3, Pongsakdi Chaisilwattana^2,3 (1.Department of Obstetrics and Gynecology, Kurashiki Medical Center, Okayama, Japan, 2.Department of Obstetrics and Gynecology, Siriraj Hospital, Mahidol University, Bangkok, Kingdom of Thailand, 3.Thai-German Multidisciplinary Endoscopic Training (TG-MET) Center, Bangkok, Thailand)

^○Tae Kusabiraki, Satoshi Tanimura, Koki Hayashi, Ai Usui, Iwao Yasoshima, Shoko Kawakami, Nariko Nakagaki, Masumi Honda, Yuri Kusabiraki, Masako Nakajima, Takayoshi Sumitani, Shinichi Yoshikoshi, Masao Nakashima, Rie Minami, Yuka Ametani (Toyama Prefectural Central Hopital, Japan)