1. Department of Neurology, Keimyung University Daegu Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea.
2. Department of Neurology, Daegu Catholic University Hospital, Catholic University of Daegu School of Medicine, Daegu, Korea.
3. Department of Neurology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
4. Department of Neurology, Yeungnam University Hospital, Yeungnam University School of Medicine, Daegu, Korea.
5. Department of Neurology, Keimyung University Dongsan Hostpial, Keimyung University School of Medicine, Daegu, Korea.