1. Department of Radiology, Human Medical Imaging and Intervention Center, Seoul 06524, Korea.
2. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea.
3. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.
4. Department of Radiology, Seoul National University College of Medicine, Seoul 03080, Korea.
5. Department of Radiology and Thyroid Center, Daerim St. Mary's Hospital, Seoul 07442, Korea.
6. Department of Radiology, Smarton Hospital, Bucheon 14534, Korea.
7. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Korea.
8. Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University, Seoul 03181, Korea.
9. Department of Radiology, Ajou University School of Medicine, Suwon 16499, Korea.
10. Department of Radiology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul 04401, Korea.
11. Department of Radiology, New Korea Hospital, Kimpo 10086, Korea.
12. Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan 48108, Korea.
13. Department of Radiology, Konyang University Hospital, Konyang University College of Medicine, Daejeon 35365, Korea.
14. Department of Radiology and Thyroid Center, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Korea.
15. Department of Radiology, Sharing and Happiness Hospital, Busan 48101, Korea.
16. Department of Radiology, Withsim Clinic, Seongnam 13590, Korea.
17. Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.
18. Department of Radiology, Dong-A University Medical Center, Busan 49201, Korea.