1. 1Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, Taichung, 402, Taiwan
2. 2Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, 402, Taiwan
3. 3National Laboratory Animal Center, National Applied Research Laboratories, Taipei, 115, Taiwan
4. 4Department of Microbiology and Immunology, School of Medicine, Taipei Medical University, Taipei, 402, Taiwan
5. 5The Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung, 402, Taiwan
6. 6Graduate Institute of Veterinary Pathobiology, College of Veterinary Medicine, National Chung Hsing University, Taichung, 402, Taiwan
7. 7School of Pharmacy, China Medical University, Taichung, 402, Taiwan