1. Graduate Institute of Natural Healing Sciences, Nanhua University, Chia-Yi 622, Taiwan
2. Graduate Institute of Chinese Pharmaceutical Sciences, China Medical University, Taichung 404, Taiwan,
3. Department of Applied Chemistry, National Chi-Nan University, Puli, Nantou 545, Taiwan,
4. Institute of Medical and Molecular Toxicology, Chung Shan Medical University, Taichung, Taiwan,
5. Department of Education & Research, Taichung Veterans General Hospital, Taichung 407, Taiwan,