1 Department of Pediatric Neurology, Fukuoka Children's Hospital, Fukuoka, Japan; Department of General Pediatrics and Interdisciplinary Medicine, Fukuoka Children's Hospital, Fukuoka, Japan. Electronic address: toriomichiko@gmail.com.
2 Department of Pediatric Neurology, Fukuoka Children's Hospital, Fukuoka, Japan.
3 Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan.
4 Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan.