1. BK 21 Center for Intelligent Nanostructured Core Material Technology, Department of Chemical & Biomolecular Engineering, Sogang University, Seoul, 123-742, Korea, Brain Disease Research Center, School of Medicine, Ajou University, Suwon, 443-721 Korea, Department of Neurosurgery, Ajou University, Suwon, 443-721 Korea, Division of Neurology, Department of Medicine, UBC Hospital, University of British Columbia, Vancouver, Canada, and Medical Research Institute, Chungang University College of Medicine,...