1. Department of Radiology, St.Vincent's Hospital, College of Medicine, The Catholic University of Korea, Gyeonggi-do, Korea.
2. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Radiology, Chung-Ang University Hospital, Seoul, Korea.
4. Department of Radiology, Gangnam Severance Hospital, Yonsei University, Seoul, Korea.
5. Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Gyeonggi-do, Korea.
6. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
7. Department of Radiology, Severance Hospital Stroke Center, Yonsei Unviersity College of Medicine, Seoul, Korea.
8. Department of Neurosurgery, Pusan National University Yangsan Hospital, Pusan National University, Yangsan, Korea.
9. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
10. Department of Radiology, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
11. Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
12. Department of Radiology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea.
13. Department of Radiology, Wonkwang University Hospital, Iksan, Korea.
14. Department of Radiology, Ajou University School of Medicine, Gyeonggi-do, Korea.
15. Department of Radiology, Keimyung University College of Medicine, Dongsan Medical Center, Daegu, Korea.
16. Department of Radiology, National Health Insurance Service Ilsan Hospital, Gyeonggi-do, Korea.
17. Department of Radiology, CHA Bundang Medical Center, CHA University, Gyeonggi-do, Korea.
18. Department of Radiology, Hanyang University College of Medicine, Seoul, Korea.
19. Department of Radiology, Ulsan University Hospital, University of Ulsan, College of Medicine, Ulsan, Korea.
20. Department of Radiology, Ewha Womans University Mokdong Hospital, Seoul, Korea.
21. Department of Radiology, Chonnam National University Hospital, Gwangju, Korea.
22. Department of Radiology, Busan Paik Hospital, Inje University, Busan, Korea.
23. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.