1. Institute of Molecular Biology, National Chung Cheng University, Chia-Yi 621, Taiwan.
2. Department of Microbiology and Immunology, Chung Shan Medical University, Taichung 402, Taiwan.
3. Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan.
4. Institute of Toxicology, Chung Shan Medical University, Taichung 402, Taiwan.
5. Department of Medical Technology, Chung Tai Institute of Health Sciences, Taichung 400, Taiwan.