1. Department of Pediatrics , Dokkyo Medical University Saitama Medical Center , Saitama , Japan
2. Child Development and Psychosomatic Medicine Center , Dokkyo Medical University Saitama Medical Center , Saitama , Japan
3. Center for Genetic Medicine , Dokkyo Medical University Saitama Medical Center , Saitama , Japan
4. Department of Pediatrics (Child Neurology), Dentistry and Pharmaceutical Sciences , Okayama University Graduate School of Medicine , Okayama , Japan