1. Laboratory of Neuropharmacology, College of Pharmacy and Gachon Institute of Pharmaceutical Science, Gachon University, Yeonsu-gu, Incheon 406-799, Republic of Korea
2. Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea
3. Department of Molecular Biology, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA