1. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
2. Division of Infectious Diseases, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Center for Infectious Disease, National Medical Center, Seoul, Korea.
4. Department of Internal Medicine, Seoul Medical Center, Seoul, Korea.
5. Respiratory Center, National Medical Center, Seoul, Korea.
6. Division of Infectious Diseases, Department of Internal Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea.
7. Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, Daejon, Korea.
8. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.
9. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
10. Division of Infectious Diseases, Department of Internal Medicine, Seonam University Myongji Hospital, Goyang, Korea.
11. Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
12. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea.
13. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
14. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
15. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
16. Division of Infectious Diseases and Office of Infection Control, Armed Forces Capital Hospital, Seongnam, Korea.
17. Department of Internal Medicine, Dongguk University College of Medicine, Gyeongju, Korea.
18. Department of Internal Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine of Chonbuk National University Hospital, Korea.
19. Department of Internal Medicine, Inje University Sanggye-Paik Hospital, Seoul, Korea.
20. Department of Internal Medicine, Ajou University School of Medicine, Suwon, Korea.
21. Department of Internal Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea.
22. Division of Infectious Diseases, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea.
23. Department of Internal Medicine, Eulji University School of Medicine, Daejeon, Korea.
24. Department of Internal Medicine, Samsung Changwon Hospital, Changwon, Korea.
25. Division of Infectious Diseases, Department of Internal Medicine, Busan Medical Centre, Busan, Korea.
26. Division of Infectious Diseases, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Korea.
27. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea.
28. Department of Infectious Diseases, Chonnom National University Medical School, Gwangju, Korea.
29. Department of Internal Medicine, Kyungpook National University, School of Medicine, Daegu, Korea.
30. Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Korea.
31. Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea.
32. Division of Infectious Diseases, Konkuk University Hospital, Seoul, Korea.