1. Department of Radiology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, South Korea
2. Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea
3. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
4. Department of Radiology, CHA University College of Medicine, Gangnam CHA Hospital, Seoul, South Korea
5. Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea
6. Department of Radiology and Thyroid Center, Daerim St. Mary’s Hospital, Seoul, South Korea
7. Department of Radiology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, South Korea