1. Department of Medicinal Botany and Health Applications, Da-Yeh University, 168 University Road, Dacun, Changhua 51591, Taiwan
2. Department of Microbiology, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan
3. Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 40227, Taiwan
4. Graduate Institute of Chinese Medicine, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan