1. Department and Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan.
2. Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan.
3. Center for Biotechnology, National Taiwan University, Taipei, Taiwan.
4. Department of Microbiology and Plant Pathology, College of Bio-resources and Agriculture, National Taiwan University, Taipei, Taiwan.