1. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
3. Department of Radiology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea.
4. Department of Radiology and Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea.
5. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
6. Department of Radiology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Radiology, Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
8. Department of Radiology and Thyroid Center, Chungang University Hospital, Chungang University College of Medicine, Seoul, Korea.
9. Department of Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
10. Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, Korea.
11. Department of Radiology, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Korea.
12. Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
13. Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.
14. Department of Radiology, Gangneung Asan Hospital, Ulsan University College of Medicine, Gangneung, Korea.