1. Department of Pediatrics, Busan St. Mary's Medical Center, Busan, Korea.
2. Institute of Health & Environment, Busan, Korea.
3. Department of Laboratory Medicine, Korea University Anam Hospital, Seoul, Korea.
4. Division of Influenza Virus, Korea Centers for Disease Control and Prevention, Cheongwon, Korea.
5. Department of Molecular Biology, Dongeui University, Busan, Korea.
6. Office of Public Healthcare Service, Pusan National University Hospital, Busan, Korea.