1. The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
2. Division of Pediatric Neurology, Department of Pediatrics, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Ophthalmology, Konyang University Hospital, Konyang University College of Medicine, Daejeon, Korea.