1. Department of Internal Medicine, Division of Infectious Disease, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea;
2. Department of Internal Medicine, Division of Infectious Diseases, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Republic of Korea;
3. Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;
4. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea