1. Department of Preventive Medicine School of Medicine Kyung Hee University Seoul South Korea
2. Division of Cancer Registration and Surveillance National Cancer Control InstituteNational Cancer Center Goyang South Korea
3. Department of Otolaryngology‐Head and Neck Surgery Head & Neck Oncology Clinic Center for Thyroid Cancer National Cancer Center Hospital Goyang South Korea
4. Department of Cancer Control and Population Health National Cancer Center Graduate School of Cancer Science and Policy National Cancer Center Goyang South Korea
5. Division of Cancer Management & Policy National Cancer Control InstituteNational Cancer Center Goyang South Korea