1. Department of Urology, China Medical University Hospital, Taichung 400, Taiwan, R.O.C.
2. Graduate Institute of Chinese Pharmaceutical Sciences, China Medical University, Taichung 400, Taiwan, R.O.C.
3. Departments of Nutrition and China Medical University, Taichung 400, Taiwan, R.O.C.
4. Department of Microbiology, China Medical University, No.91 Hsueh-Shih Road, Taichung 400, Taiwan, R.O.C.