1. Department of Interventional Neuroradiology Beijing Tiantan Hospital Capital Medical University Beijing China
2. Beijing Neurosurgical Institute Capital Medical University Beijing China
3. Department of Neurology Tangshan Gongren HospitalHebei Medical University Tangshan China
4. Illinois Neurological Institute Stroke Network Sisters of the Third Order of St Francis Healthcare System University of Illinois College of Medicine Peoria IL USA
5. Department of Neurology Beijing Tiantan Hospital Capital Medical University Beijing China
6. China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical University Beijing China