1. Division of Infectious Diseases, Department of Internal Medicine, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
2. Department of Statistics, Kyungpook National University, 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. Department of Medical Informatics, School of Medicine, Kyungpook National University, Daegu, Korea.
5. Quality Assessment Department, HIRA (Health Insurance Review & Assessment Service).