1. Department of Radiology, Hanyang University Medical Center, Seoul, Korea.
2. Department of Radiology, Eunpyeong 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, Asan Medical Center, Seoul, Korea.
5. Department of Neurology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
6. Department of Psychiatry, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
7. Department of Radiology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.