1. Department of Pediatrics, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea.
2. Division of Pediatric Neurology, Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Clinical Genetics, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.