1. Division of Immunization, Korea Disease Control and Prevention Agency, Cheongju, Korea.
2. KDI School of Public Policy and Management, Sejong, Korea.
3. Graduate School of Public Health, Chungnam National University, Daejeon, Korea.
4. Division of Emerging Infectious Disease Response, Bureau of Infectious Disease Emergency Preparedness and Response, Korea Disease Control and Prevention Agency, Cheongju, Korea.
5. Division of Vaccine Supply, Korea Disease Control and Prevention Agency, Cheongju, Korea.
6. Bureau of Healthcare Safety and Immunization, Korea Disease Control and Prevention Agency, Cheongju, Korea.