1. Department of Radiology, Korea University Hospital, 123 Jukgeumro, Danwongu, Ansan, Gyeonggi 15355, Republic of Korea.
2. Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
3. Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH.
4. Neurology Division, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
5. Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH.