1. Departments of Neurology and Stroke Center Beijing Tiantan Hospital Capital Medical University Beijing China
2. Department of Neurology The First Affiliated Hospital Jinan University Guangzhou Guangzhou China
3. Department of Medicine & Therapeutics The Chinese University of Hong Kong Prince of Wales Hospital Shatin Hong Kong
4. OSF/INI Comprehensive Stroke Center Department of Neurology University of Illinois College of Medicine at Peoria Peoria IL USA