1. From the Department of Neurology, Kangbuk Samsung Hospital (J.-H.B.), Sungkyunkwan University School of Medicine, Seoul, Korea
2. Departments of Neurology (J.-H.B., J.H.H., H.S.N., Y.D.K.), Yonsei University College of Medicine, Seoul, Korea
3. Radiology (B.M.K., D.J.K.), Yonsei University College of Medicine, Seoul, Korea
4. Departments of Neurosurgery (D.-H.K.), Kyungpook National University Hospital, Daegu, Korea
5. Radiology (D.-H.K., Y.-S.K.), Kyungpook National University Hospital, Daegu, Korea
6. Neurology (Y.-H.H., Y.-W.K.), Kyungpook National University Hospital, Daegu, Korea
7. Department of Radiology, Chonbuk National University Medical School and Hospital, Jeonju, Korea (H.S.K.)
8. Department of Radiology, Konkuk University Hospital, Seoul, Korea (H.G.R.)
9. Department of Radiology, Hanyang University Hospital, Seoul, Korea (Y.-J.L.)
10. Department of Radiology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea (S.H.K.)
11. Department of Radiology, Pusan National University Yangsan Hospital, Korea (S.K.B.)
12. Department of Radiology, Samsung Medical Center (P.J.), Sungkyunkwan University School of Medicine, Seoul, Korea
13. Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea (J.Y.)
14. Severance Hospital Stroke Center, and Department of Radiology, Gangnam Severance Hospital (S.H.S.), Yonsei University College of Medicine, Seoul, Korea
15. Department of Radiology, Korea University Anam Hospital, Seoul (B.K.)
16. Department of Radiology, Inje University Ilsan Paik Hospital, Goyang, Korea (J.W.K.)
17. Department of Radiology, Korea University Guro Hospital, Seoul (S.S.)
18. Department of Neurosurgery, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea (H.-J.J.).