1. Department of Internal Medicine, Catholic University of Daegu, School of Medicine, Daegu, Korea.
2. Department of Infectious Diseases, Daegu Fatima Hospital, Daegu, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea.
5. Department of Infectious Diseases, Keimyung University Dongsan Medical Center, Daegu, Korea.
6. Department of Internal Medicine, Daegu Veterans Hospital, Daegu, Korea.
7. Department of Internal Medicine, Yeungnam University Medical Center, Daegu, Korea.