1. Institute of Chinese Medical Sciences, China Medical University, 91 Hsueh Shih Road, Taichung 404, Taiwan, R.O.C.
2. Institute of Chinese Pharmaceutical Sciences, China Medical University, 91 Hsueh Shih Road, Taichung 404, Taiwan, R.O.C.
3. School of Medicine, Kyorin University, Tokyo, Japan, and Jen-Te Junior College of Medicine, Nursing and Management, Miaoli, Taiwan, R.O.C.