^○Ryuki Matsuura^1,2, Shin-ichiro Hamano¹, Jun Kubota^1,2, Yuko Nakamura⁴, Erika Hiwatari¹, Satoru Ikemoto^2,3, Reiko Koichihara³, Kenjiro Kikuchi², Motoyuki Minamitani³ (1.Division of Neurology, Saitama Children's Medical Center, Saitama, Japan, 2.Department of Pediatrics, The Jikei University School of Medicine, Tokyo, Japan, 3.Division of Child Health and Human Development, Saitama Children's Medical Center, Saitama, Japan, 4.Division of Critical Care Medicine, Saitama Children's Medical Center, Saitama, Japan)

^○Atsuko Oba¹, Shin-ichiro Hamano² (1.Department of Pediatrics, The Jikei University Kashiwa Hospital, Tokyo, Japan, 2.Division of Neurology, Saitama Children's Medical Center, Saitama-shi, Japan)

^○Shin Okazaki, Ichirou Kuki, Hisashi Kawawaki, Masataka Fukuoka, Kiyohiro Kin, Megumi Nukui, Takeshi Inoue (Departmet of Pediatric Neurology, Osaka City General Hospital,Osaka,Japan)

^○Tomokazu Kimizu, Yukitoshi Takahashi, Taikan Oboshi, Asako Horino, Hirowo Omatu, Takayoshi Koike, Shinsaku Yoshitomi, Tokito Yamaguchi, Hiroko Ikeda, Katsumi Imai, Hideo Shigematsu, Yushi Inoue (Department of Pediatrics, National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, NHO, Shizuoka, Japan)

^○Yukitoshi Takahashi¹, Jyun Toyama², Hiroshi Fujita², Chizuru Ikeda², Jyunya Takahashi², Shigeki Tanaka², Masayoshi Nagao², Hiroshi Shiraga², Hideo Kaneko², Yasuko Sawai², Akiko Oota¹ (1.National epilepsy center, Shizuoka institute of epilepsy and neurological disorders, NHO, Shizuoka, Japan, 2.National Hospital Organization Network Study West syndrome, Japan)

^○Yusuke Ishida^1,2, Kazumi Tomioka², Tsukasa Tanaka^1,2, Masahiro Nishiyama², Kyoko Fujita³, Daisaku Toyoshima¹, Azusa Maruyama¹, Hiroaki Nagase², Hiroshi Kurosawa⁴, Hiroki Takeda³, Yoshiyuki Uetani³, Kazumoto Iijima² (1.Department of Neurology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan, 2.Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe,Japan, 3.Department of Emergency and General Medicine, Hyogo Prefectural Kobe Children's Hospital, Kobe,Japan, 4.Department of Pediatric Critical Care Medicine, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan)