1. Divison of Pediatric Neurology, Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Epilepsy Research Institute, Seoul, Korea.
2. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pediatrics, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
5. Department of Biotechnology, Korea University, Seoul, Korea.