1. Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Neurology, Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Interventional Neuroradiology, Department of Radiology, Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Neurosurgery, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
6. Department of Neurosurgery, Andong Hospital, Andong, Korea.
7. Department of Neurology, Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea.
8. Department of Neurosurgery, Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea.
9. Department of Radiology, Chungbuk National University Hospital, Cheongju, Korea.
10. College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Korea.
11. Department of Radiology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
12. Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
13. Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
14. Department of Neurology, Mokdong Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
15. Department of Neurosurgery, International St. Mary’s Hospital, Catholic Kwandong University, Incheon, Korea.
16. Department of Neurosurgery, College of Medicine, Soonchunhyang University, Cheonan Hospital, Cheonan, Korea.