1. Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand.
2. Research Institute for Health Sciences, Chiang Mai University, Chiang Mai 50200, Thailand.
3. Skaggs Institute for Chemical Biology, and Departments of Molecular Biology and Chemistry, Scripps Research Institute, La Jolla, CA 92037.
4. Biomedical Technology Research Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand.