1. Graduate Institute of Nature Products Kaohsiung Medical College, Kaohsiung, Taiwan, R.O.C
2. National Research Institute of Chinese Medicine, Taiwan, R.O.C
3. Ziel Enterprise Co., Ltd. Kaohsiung, Taiwan, R.O.C
4. Japan Food Research Laboratories, Nagoya Branch, Oosu Naka-Ku, Nagoya 460, Japan