1. Total Healthcare Center, Kangbuk Samsung Hospital, Sungkyunkwan University, School of Medicine, Seoul, Republic of Korea.
2. Department of Occupational and Environment Medicine, School of Medicine, Kyung Hee University, Seoul, Republic of Korea.
3. Informatization Department, Ewha Womans University Seoul Hospital, Seoul, Republic of Korea.
4. Center for Thyroid Cancer, National Cancer Center, Goyang, Republic of Korea.
5. Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea.
6. Department of Preventive Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea.
7. Departments of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, Republic of Korea.