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