1. Department of Internal Medicine, Kaohsiung Municipal Siaogang Hospital, Kaohsiung City, Taiwan.
2. Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan.
3. Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan.
4. Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
5. Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung City, Taiwan.
6. Tropical Medicine Center, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
7. Infection Control Office, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung City, Taiwan.
8. Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.