1. Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
2. Infection Control Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
3. Department of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
4. Department of Geriatrics and Gerontology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
5. Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
6. Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
7. Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
8. Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
9. National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Tainan, Taiwan