1. Daejeon-Chungnam Regional Cerebrovascular Center; Hospital and School of Medicine; Chungnam National University; Daejeon Korea
2. Department of Neurology; Hospital and School of Medicine; Chungnam National University; Daejeon Korea
3. Department of Neurosurgery; Hospital and School of Medicine; Chungnam National University; Daejeon Korea
4. Department of Preventive Medicine; School of Medicine; Chungnam National University; Daejeon Korea