1 Divison of Pediatric Neurology, Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Epilepsy Research Institute, Seoul, South Korea.
2 Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, South Korea.
3 Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, South Korea. Electronic address: lee.st@yuhs.ac.
4 Divison of Pediatric Neurology, Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Epilepsy Research Institute, Seoul, South Korea. Electronic address: HIPO0207@yuhs.ac.