1. Department of Microbiology and Immunology, Chung-Shan Medical University, Taichung
2. Institute of Medicine, Chung-Shan Medical University, Taichung
3. Department of Life Science, National Chung-Cheng University, Chia-Yi
4. Department of Biological Science and Technology, National Chiao-Tung University, Hsinchu
5. Institute of Molecular Medicine, National Tsing-Hua University, Hsinchu, Taiwan, Republic of China