1. Endocrinology, Diabetes, and Metabolism Unit, A.O. Ordine Mauriziano di Torino, “Umberto I” Hospital, Turin, Italy.
2. Department of Radiology, Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea.
3. Department of Internal Medicine, Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea.
4. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.