1. Division of Infectious Diseases, Department of Internal Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea.
2. Division of Infectious Diseases, Department of Medicine, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
4. Paik Institute for Clinical Research, Inje University College of Medicine, Busan, Korea.
5. Division of Infectious Diseases, Department of Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.