1. Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine University of Science and Technology of China Hefei China
2. Department of Radiology, Boston Medical Center Boston University School of Medicine Boston Massachusetts USA
3. Department of Neurology Boston University School of Medicine Boston Massachusetts USA
4. Department of Radiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine University of Science and Technology of China Hefei China
5. Department of Neurology Provincial Hospital Affiliated to Anhui Medical University Hefei China