1. Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, 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, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Internal Medicine, Pusan National University School of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, Korea.
6. Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea.
7. Department of Internal Medicine, School of Medicine, Chungnam National University, Daejeon, Korea.
8. Division of Infectious Diseases, Department of Internal Medicine, Inje University College of Medicine, Busan, Korea.
9. Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, Jeju National University, Jeju, Korea.
10. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
11. Division of Infectious Diseases, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University College of Medicine, Seoul, Korea.
12. Department of Internal Medicine, Yeungnam University Medical Center, Daegu, Korea.
13. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.