1. Department of Neurology; Dong-A University College of Medicine; Busan Korea
2. Department of Neurology; Chonbuk National University College of Medicine; Jeonju Korea
3. Department of Neurology; Chungnam National University College of Medicine; Daejeon Korea
4. Department of Neurology; Seoul National University Boramae Hospital; Seoul Korea
5. Department of Neurology, Kangdong Sacred Heart Hospital; Hallym University College of Medicine; Seoul Korea