1. Department of Pediatrics, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
2. Department of Medical Science, Chungnam National University School of Medicine, Daejeon, Korea.
3. Department of Radiology, Chungnam National University Hospital, Daejeon, Korea.
4. Brain Research Institute, Chungnam National University School of Medicine, Daejeon, Korea.