1. Department of Neurology; Seoul National University-Seoul Metropolitan Government Boramae Medical Center; Seoul Republic of Korea
2. College of Medicine; Seoul National University; Seoul Republic of Korea
3. Department of Nuclear Medicine; Seoul National University-Seoul Metropolitan Government Boramae Medical Center; Seoul Republic of Korea
4. Department of Neurology; Eulji General Hospital; Seoul Republic of Korea
5. Department of Psychiatry; Seoul National University-Seoul Metropolitan Government Boramae Medical Center; Seoul Republic of Korea
6. Department of Neurology; Seoul National University Hospital; Seoul Republic of Korea