1. Division of Infectious Diseases, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea.
5. Division of Infectious Diseases, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6. Division of Infectious Diseases, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea.
7. Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
8. Division of Infectious Diseases, Department of Internal Medicine, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea.
9. Department of Pediatrics, Seoul St. Mary's Hosptial, College of Medicine, The Catholic University of Korea, Seoul, Korea.
10. Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea.