1. Department of Neurology Beth Israel Deaconess Medical Center Harvard Medical School Boston Massachusetts USA
2. Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
3. Department of Neurosurgery Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA
4. Department of Radiology Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA
5. Department of Neurology Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA
6. Department of Neurology Boston Medical Center Boston University School of Medicine Boston Massachusetts USA