1. Department of Neurology; College of Medicine; The Catholic University of Korea; Seoul Korea
2. Department of Neurology; Yonsei University College of Medicine; Seoul Korea
3. Department of Neurology; School of Medicine; Kyung Hee University; Seoul Korea
4. Department of Neurology; Hallym University College of Medicine; Anyang Korea
5. Department of Neurology; Konyang University Hospital; College of Medicine; Konyang University; Daejeon Korea
6. Department of Neurology; Korea University College of Medicine; Seoul Korea
7. Department of Neurology; Sejong General Hospital; Bucheon Korea