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, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, Yeungnam University Medical Center, Daegu, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea.
5. Division of Infectious Diseases, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea.
6. Division of Infectious Diseases, Department of Internal Medicine, Chung-Ang University Medical Center, Seoul, Korea.
7. Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Hospital, Seoul, Korea.