1. College of Pharmacy, Seoul National University, Seoul, Korea.
2. Center for Geriatric Neuroscience Research and Department of Pharmacology, School of Medicine, Konkuk University, Seoul, Korea.
3. College of Pharmacy, Kyung Hee University, Seoul, Korea.
4. Department of Neuroscience, College of Medicine, Korea University, Seoul, Korea.
5. Department of Pharmacology and Toxicology, Comprehensive Cancer Center, Center for AIDS Research, University of Alabama, Birmingham, Alabama.