1. From the Department of Neurology, National Medical Center, Seoul, Korea (J.-H.B.)
2. Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)
3. Department of Radiology, Severance Hospital Stroke Center (B.M.K., D.J.K.)
4. Yonsei University College of Medicine, Seoul, Korea; Departments of Neurology (O.Y.B.)
5. Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Korea (J.Y.)
6. Radiology (P.J.)
7. Department of Radiology, Pusan National University Yangsan Hospital, Korea (S.K.B., J.R.)
8. Department of Radiology, Gangnam Severance Hospital (S.H.S.)
9. Department of Neurology, Gangnam Severance Hospital (K.-Y.L.)
10. Departments of Radiology (H.S.K.)
11. Chonbuk National University Medical School and Hospital, Jeonju, Korea; Departments of Radiology (H.G.R.)
12. Konkuk University Hospital, Seoul, Korea; Department of Radiology, Hanyang University Hospital, Seoul, Korea (Y.-J.L.)
13. Department of Radiology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea (S.H.K.)
14. Department of Radiology, Kyung Hee University Gangdong Hospital, Seoul, Korea (C.W.R.)
15. Department of Radiology, St. Vincent’s Hospital, Catholic University School of Medicine, Suwon, Korea (Y.K.I.)
16. Department of Radiology, Korea University Anam Hospital, Seoul (B.K.)
17. Department of Neurosurgery, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea (H.J.-J.)
18. Department of Radiology, Inje University Ilsan Paik Hospital, Korea (J.W.K.)
19. Department of Radiology, Chung-Ang University Hospital, Seoul, Korea (J.S.B., W.J.L.)
20. Department of Radiology, Korea University Guro Hospital, Seoul (S.S.).
21. Neurology (J.J.P.)
22. Neurology (B.-S.S.)