1. Department of Neurology, Center for Geriatric Neuroscience Research, Institute of Biomedical Science and Technology, School of Medicine, Konkuk University, Seoul, Korea.
2. Department of Neurology, Hanyang University College of Medicine, Seoul, Korea.
3. Department of Pharmacology, Center for Geriatric Neuroscience Research, Institute of Biomedical Science and Technology, School of Medicine, Konkuk University, Seoul, Korea.