1. Division of Infectious diseases, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
2. Division of Disease Control Policy, Gyeonggi Provincial Government, Suwon, Korea.
3. Korea Disease Control and Prevention Agency, Cheongju, Korea.
4. Gyeonggi Infectious Disease Control Center, Suwon, Korea.
5. Division of Biostatistics, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Korea.