1. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
2. Department of Internal Medicine, Center for Thyroid Cancer, National Cancer Center, Goyang, Korea
3. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
4. Department of Surgery, Yeungnam University Hospital, Daegu, Korea
5. Department of Otolaryngology-Head and Neck Surgery, Chungnam National University Hospital, Daejeon, Korea
6. Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
7. Department of Radiology, Gangneung Asan Hospital, Gangneung, Korea
8. Department of Otorhinolaryngology-Head and Neck Surgery, Korea University Anam Hospital, Seoul, Korea
9. Department of Nuclear Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
10. Department of Radiology, Yeouido St. Mary’s Hospital, Seoul, Korea
11. Department of Nuclear Medicine, Kyungpook National University Hospital, Daegu, Korea
12. Department of Pediatrics, Seoul National University Hospital, Seoul, Korea
13. Department of Surgery, Gangnam Severance Hospital, Seoul, Korea
14. Department of Radiology, Seoul National University Hospital, Seoul, Korea
15. Department of Internal Medicine, Seoul St. Mary’s Hospital, Seoul, Korea
16. Department of Radiology, Korea University Guro Hospital, Seoul, Korea
17. Department of Otorhinolaryngology-Head and Neck Surgery, Center for Thyroid Cancer, National Cancer Center, Goyang, Korea
18. Department of Hospital Pathology, Seoul St. Mary’s Hospital, Seoul, Korea
19. Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
20. Department of Internal Medicine, Chung-Ang University Hospital, Seoul, Korea
21. Department of Internal Medicine, Asan Medical Center, Seoul, Korea
22. Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, Korea