1. National Research Institute of Chinese Medicine, Taipei 112, Taiwan
2. School of Nutrition, College of Health Care and Management, Chung Shan Medical University, Taichung 402, Taiwan
3. Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
4. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan