1. Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
2. Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen DK-2200, Denmark.
3. Divison of Chemotherapy, Kindai University Faculty of Pharmacy, Higashi-osaka 577, Japan.
4. The Health and Kampo Institute, 1-11-10 Murasakiyama, Sendai, Miyagi 982-3205, Japan.