1. Department of Neurology Northwestern University Feinberg School of Medicine Chicago Illinois USA
2. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Cerebrovascular Research Laboratory Spaulding Rehabilitation Hospital Boston Massachusetts USA
3. Department of Radiology Massachusetts General Hospital Boston Massachusetts USA
4. Department of Radiology Northwestern University Feinberg School of Medicine Chicago Illinois USA
5. Department of Radiology Shengjing Hospital of China Medical University China
6. Department of Biomedical Engineering Northwestern University Evanston Illinois USA
7. Department of Preventive Medicine Northwestern University Feinberg School of Medicine Chicago Illinois USA
8. Institute of Physics, Department of Medical Physics University of Greifswald Germany