1. Department of Radiology and Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
2. Severance Pediatric Liver Disease Research Group, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Pediatric Surgery, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.