1. Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pediatric Gastroenterology, Hepatology, and Nutrition, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Radiology, Research Institute of Radiological Science, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.