1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Radiology, Gangneung Asan Hospital, Gangneung, Korea.
3. Department of Radiology, Human Medical Imaging and Intervention Center, Seoul, Korea.
4. Department of Radiology, Ajou University School of Medicine, Suwon, Korea.
5. Department of Radiology and Thyroid Center, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea.
6. Department of Radiology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
7. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
8. Department of Radiology, Hanyang University College of Medicine, Hanyang University Hospital, Seoul, Korea.
9. Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
10. Department of Radiology and Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea.
11. Department of Radiology, Haeundae Paik Hospital, Inje University School of Medicine, Busan, Korea.
12. Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
13. Department of Radiology, Withsim Clinic, Seongnam, Korea.
14. Department of Radiology, Sheikh Khalifa Specialty Hospital, Ras Al Khaima, UAE.
15. Department of Radiology, Haeundae Sharing and Happiness Hospital, Busan, Korea.
16. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
17. Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea.
18. Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University, Seoul, Korea.