1. Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
2. Department of Neurology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
3. Clinical Trial Center, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.