1. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea
2. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
4. Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea
5. Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
6. Center for Thyroid Cancer, National Cancer Center, Goyang, Korea
7. Department of Laboratory Medicine, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea
8. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
9. Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Korea
10. Department of Laboratory Medicine, Kangdong Sacred Heart Hospital, Seoul, Korea
11. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea