1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
2. Department of Radiology, Seoul National University College of Medicine, Korea.
3. Department of Radiology, Incheon Medical Center, College of Medicine, Inha University, Korea.
4. Department of Radiology, Asan Kang Nung Hospital, Korea.
5. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Korea.
6. Department of Radiology, Gachon Medical School, Ghil Medical Center, Korea.
7. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.