1. Department of Neurointervention, Dalian Municipal Central Hospital, China (D.L., T.H.).
2. Department of Neurology and Psychiatry, Emergency and Critical Care Medical Center, Beijing Shijitan Hospital (T.T., S.L.), Capital Medical University, China.
3. The Russell H. Morgan Department of Radiology and Radiological Sciences, the Johns Hopkins University School of Medicine, Baltimore, MD (A.M.T.).
4. Beijing Institute of Brain Disorders (S.L.), Capital Medical University, China.