1. From the Department of Neurology and Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea (D.K., M.-K.H., B.J.K., H.-J.B.)
2. Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA (D.K.)
3. Department of Neurology, Nowon Eulji Medical Center, Eulji University, Seoul, Korea (J.-M.P., K.K.)
4. Department of Neurology, Inje University Ilsan Paik Hospital, Goyang, Korea (Y.-J.C., K.-S.H.)
5. Department of Neurology, Soonchunhyang University Hospital, Seoul, Korea (K.B.L.)
6. Department of Neurology, Seoul Medical Center, Korea (T.H.P.)
7. Department of Neurology, Eulji University Hospital, Daejeon, Korea (S.J.L., J.G.K.)
8. Department of Neurology, Yeungnam University Hospital, Daegu, Korea (Jun Lee)
9. Department of Neurology, Dong-A University Hospital, Busan, Korea (J.-K.C., D.-H.K., H.-W.N.)
10. Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea (D.-E.K., W.-S.R.)
11. Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C.)
12. Department of Neurology, Jeju National University Hospital, Korea (J.C.C.)
13. Department of Neurology, Hallym University College of Medicine, Pyeongchon, Korea (B.-C.L., K.-H.Y., M.-S.O.)
14. Department of Neurology, Ulsan University College of Medicine, Korea (W.-J.K., J.-H.K.)
15. Department of Neurology, Chungbuk National University Hospital, Cheongju, Korea (D.-I.S.)
16. Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Korea (S.-I.S., J.-H.H.)
17. Clinical Research Center, Asan Medical Center, Seoul, Korea (J.S.L.)
18. Department of Biostatistics, Korea University College of Medicine, Seoul (Juneyoung Lee)
19. Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL (P.B.G)
20. Population Health Research Institute, McMaster University Faculty of Health Sciences & Hamilton University Health Sciences, Hamilton, ON, Canada (P.B.G).