Yuichi Akaba¹, yoshiaki sasaki¹, hiroki kajino¹, satoru takahashi² (1.Department of Pediatrics, Abashiri Kosei General Hospital, Abashiri, Japan, 2.Department of Pediatrics, Asahikawa Medical University, Asahikawa, Japan)

Kazushi Ichikawa¹, TATSURO KUMAKI¹, AYAKO YAMAMOTO¹, TAKESHI SEI¹, YU TSUYUSAKI¹, MEGUMI TSUJI¹, MIZUE IAI¹, SUMIMASA YAMASHITA¹, KENJI KUROSAWA², TOMOHIDE GOTO¹ (1.Division of Neurology, Kanagawa Children's Medical Center, Yokohama, Japan, 2.Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan)

Yoshimi Watanabe¹, HIROMI AOYAMA¹, KAZUO KODAMA¹, TOMU KUCHIKATA², taku omata¹ (1.Division of Child Neurology, Chiba Children's Hospital, Chiba, Japan, 2.Division of Child Medical genetics, Chiba Children's Hospital, Chiba, Japan)

Kumiko Ishiguro¹, KEIKO ISHIGAKI¹, TAKATOSHI SATO¹, MINOBU SHICHIJI¹, TERUMI MURAKAMI^1,2, ICHIZO NISHINO³, MADOKA MORI⁴, SATORU NAGATA¹ (1.Department of Pediatrics, Tokyo Women's Medical University, School of Medicine, Tokyo, Japan, 2.Department of Neurology, Higashisaitama National Hospital, Japan., 3.Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan., 4.Department of Neurology, National Center Hospital, NCNP, Tokyo, Japan.)