〇Takashi Hakusui¹, Motonori Nakagawa¹, Akiko Niihara¹, Yasuyoshi Sakurai¹ (1. Aiiku Hospital)

〇Shohei Noguhi¹, Motoshi Tanaka¹, Yuki Ohashi¹, Azusa Kato¹, Kazumi Tamura¹, Katsuo Terui¹ (1. Saitama Medical Center's Department of Obstetric Anesthesiology )

〇Yuki Minami¹, Reiko Uokawa¹, Chiharu Kawagoe¹, Chie Matsuda¹, Chiyo Otaki¹, Yuji Fujino¹ (1. Osaka University Graduate School of Medicine, Department of Anesthesia and Intensive Care Medicine)

〇Mao Kinoshita¹, Taisuke Fujita², Masaru Shimizu¹, Hideya Kato¹, masayuki Shibasaki¹, Masahiro Sakaguchi² (1. Kyoto Prefectural University of Medicine, 2. Japanese Red Cross Society Kyoto Daiichi Hospital)

〇Hidekazu Naruo¹, Kei Kamiutsuri¹, Shunji Kobayashi¹ (1. Rink General Medical Center)

〇Arisa Ijuin^1,2, Masaki Sato¹, Yoko Yamashita¹, Kota Kubo¹, Yasuyuki Suzuki¹ (1. National Center for Child Health and Development, 2. Tokyo Wemen's Medical University, Department of Anesthesiology)