1. Department of Anesthesiology and Critical Care Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Neurology Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
3. Department of Neurology, Minhang Hosptial Fudan University Shanghai China
4. Internal Medicine and President Everest Medical Group Philadelphi Pennsylvania USA
5. Department of Neurology, Beth Israel Deaconess Medical Center Harvard Medical School Boston Massachusetts USA
6. Stroke Medicine Kings College London London UK