1. Department of Internal Medicine, National Cheng Kung University Medical College and Hospital, Tainan, Taiwan, ROC
2. National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Tainan, Taiwan, ROC
3. Department of Graduate Institute of Clinical Medicine, National Cheng Kung University Medical College, Tainan, Taiwan, ROC
4. Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University, Tainan, Taiwan, ROC
5. Department of Pathology, National Cheng Kung University Medical College and Hospital, Tainan, Taiwan, ROC
6. Center for Infection Control, National Cheng Kung University Hospital, Tainan, Taiwan, ROC