1. Department of Neurology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea (B.S.K.Y., K.-J.L., B.J.K., M.-K.H., H.-J.B.).
2. Department of Neurology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea (M.-J.).
3. Department of Neurology, Korea University Guro Hospital, Seoul, Republic of Korea (K.-J.L.).
4. Department of Neurology, Chonnam National University Hospital, Gwangju, Republic of Korea (J.-T.K., K.-H.C.).
5. Department of Neurology, Dong-A University Hospital, Busan, Republic of Korea (J.-K.C., D.-H.K.).
6. Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Republic of Korea (D.-E.K., W.-S.R.).
7. Department of Neurology, Uijeongbu Eulji Medical Center, Eulji University, Seoul, Republic of Korea (J.-M.P.).
8. Department of Neurology, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Republic of Korea (K.K.).
9. Department of Neurology, Eulji University Hospital, Daejeon, Republic of Korea (S.J.L.).
10. Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea (J.G.K., M.-S.O., K.-H.Y., B.-C.L.).
11. Department of Neurology, Inje University Ilsan Paik Hospital, Goyang, Republic of Korea (K.-S.H., Y.-J.C.).
12. Department of Neurology, Jeju National University Hospital, Republic of Korea (J.C.C.).
13. Department of Neurology, Seoul Medical Center, Republic of Korea (T.H.P.).
14. Department of Neurology, Soonchunhyang University Hospital, College of Medicine, Seoul, Republic of Korea (K.B.L.).
15. Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine, Republic of Korea (J.-H.K., W.-J.K.).
16. Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea (S.I.S., J.-H.H.).
17. Department of Neurology, Yeungnam University Medical Center, Daegu, Republic of Korea (J.L.).
18. Department of Neurology, Hallym University Chuncheon Sacred Heart Hospital, South Korea (S.-H.L.).
19. Clinical Research Center, Asan Medical Center, Seoul, Republic of Korea (J.S.L.).
20. Department of Biostatistics, Korea University, Seoul (J.L.).
21. Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL (P.B.G.).