1. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, 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 Endocrinology and Metabolism, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea.
4. Department of Radiology, Thyroid Center, Daerim St. Mary's Hospital, Seoul 07442, Korea.
5. Department of Internal Medicine, Thyroid Center, Daerim St. Mary's Hospital, Seoul 07442, Korea.
6. Department of Radiology, Seoul National University College of Medicine, Seoul 03080, Korea.
7. Department of Radiology, Sharing and Happiness Hospital, Busan 48101, Korea.
8. Department of Radiology, Withsim Clinic, Seongnam 13590, Korea.
9. Department of Radiology, Human Medical Imaging & Intervention Center, Seoul 06524, Korea.