1. Department of Biological Sciences & Center for Geriatric Neuroscience Research, IBST, Konkuk University, Seoul 143-701, Korea
2. Department of Neurology, Konkuk University Hospital, Center for Geriatric Neuroscience Research, IBST, Konkuk University, Seoul 143-729, Korea
3. Department of Anatomy, College of Medicine, Konkuk University, Seoul 143-729, Korea
4. Traditional Korean Medicine Converging Research Division, Korea Institute of Oriental Medicine, Daejeon 305-811, Korea