1. Pharmaceutical Cosmetic Raw Materials and Natural Products Research and Development Center, Institute for Science and Technology Research and Development,1 and
2. Department of Pharmaceutical Technology, Faculty of Pharmacy,2 and
3. Department of Clinical Immunology, Faculty of Associated Medical Sciences,3 Chiang Mai University, 50200 Chiang Mai, Thailand, and
4. Microbielle Genetik, Universität Tübingen, D-72076 Tübingen,4 and
5. Boehringer Ingelheim Pharma KG, 88397 Biberach (Riss),5Germany