1. Department of Radiology, Chung-Ang University Hospital, Seoul, Korea.
2. Department of Radiology, Ewha Womans University Seoul Hospital, Seoul, Korea.
3. Department of Radiology, Gunkuk University Hostpial, Seoul, Korea.
4. Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Division for Healthcare Technology Assessment Research, National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea.
6. Department of Radiology, Ajou University School of Medicine, Suwon, Korea.
7. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Seoul, Korea.