1. From the Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, China (S.K., X.L., D.Z., R.W., Y.Z., Q.Z., J.-z.Z.)
2. China National Clinical Research Center for Neurological Diseases, Beijing (S.K., X.L., D.Z., R.W., Y.Z., Q.Z., J.-z.Z.)
3. Center of Stroke, Beijing Institute for Brain Disorder, China (S.K., X.L., D.Z., R.W., Y.Z., Q.Z., J.-z.Z.)
4. Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD (W.Y.).