1. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
3. Division of infectious diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
5. Division of Infectious Diseases, Department of Internal Medicine, Inha University School of Medicine, Incheon, Korea.
6. Division of Infectious Diseases, Department of Internal Medicine, National Medical Center, Seoul, Korea.
7. Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University School of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
9. Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
10. Department of Internal Medicine, Ewha Woman’s University School of Medicine, Seoul, Korea.
11. Department of Internal Medicine, Ajou University College of Medicine, Suwon, Korea.