1. Department of Neurology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Incheon, Korea.
2. Department of Nuclear Medicine, Incheon St. Mary’s Hospital, The Catholic University of Korea, Incheon, Korea.
3. Department of Neurology, Soonchunhyang University Cheonan Hospital, Soonchunhyang University, Cheonan, Korea.