1. Department of Radiology, Human Medical Imaging and Intervention Center, Seoul, Korea.
2. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Radiology, Daerim St. Mary's Hospital, Seoul, Korea.
4. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
5. Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
6. Department of Pathology, Clinical Laboratory, Medical Research Center at Ewha Womans University College of Medicine, Seoul, Korea.
7. Department of Pathology, Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea.