^○Mitsuhiro Kato^1,2 (1.Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan, 2.Epilepsy Medical Center, Showa University Hospital, Tokyo, Japan)

^○Hideaki Shiraishi (Department of Pediatrics, Dokkyo Medical University, Mibu, Shimotsugagun, Tochigi)

^○Kazuhiro Muramatsu (Department of Pediatrics, Jichi Medical University, Tochigi, Japan)