1. The Institute of Medical Science and Department of Microbiology, China Medical University Hospital, Taichung, Taiwan.
2. Infection Control Office, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan.
3. Department of Medical Technology, Jen-The Junior College of Medicine, Nursing and Management, Miaoli, Taiwan.
4. Department of Medical Research, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan.
5. The Institute of Biomedical Sciences College of Medicine, China Medical University, Taichung, Taiwan.
6. Department of Internal Medicine, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan.