1. Department of Pharmacology, College of Medicine, Seoul National University, Seoul 110-799, Korea.
2. Korea Brain Research Institute (KBRI), Daegu 700-010, Korea.
3. Braintropia Co. Ltd., Anyang 431-716, Korea.
4. Department of Pharmacology, Gachon University of Medicine and Science, Incheon 406-799, Korea.