1. Department of Microbiology and Immunology
2. Department of Medical Laboratory Science and Biotechnology
3. Institute of Clinical Medicine
4. Institute of Basic Medical Sciences
5. Department of Pediatrics, National Cheng Kung University Medical College, Tainan 701, Taiwan
6. Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia B3H 1X5, Canada