1. Department of Pediatrics, Korea University Anam Hospital, Seoul, Korea.
2. Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Pediatrics, Bundang Jesaeng General Hospital, Seongnam, Korea.
4. Department of Pediatrics, Nowon Eulji University Hospital, Seoul, Korea.
5. Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Pediatrics, Sungkyunkwan University School of Medicine, Seoul, Korea.
7. Department of Pediatrics, School of Medicine Kyungpook National University, Daegu, Korea.
8. Department of Pediatrics, Pusan National University School of Medicine, Yangsan, Korea.
9. Department of Pediatrics, Korea University College of Medicine, Seoul, Korea.
10. Department of Pediatrics, Kangbuk Samsung Hospital, Seoul, Korea.
11. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
12. Director General for Public Health Emergency Preparedness, Korea Disease Control and Prevention Agency, Cheongju, Korea.