1. Department of Human Genetics; Yokohama City University Graduate School of Medicine; Yokohama Japan
2. Department of Pediatrics; Yamagata University Faculty of Medicine; Yamagata Japan
3. Department of Pediatrics, Epilepsy Center; Nishi-Niigata Chuo National Hospital; Niigata Japan
4. Department of Pediatrics; Kimitsu Chuo Hospital; Chiba Japan