1. Surgical Neurology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland
2. Center for Stroke Research Berlin, Charité University Medicine, Berlin, Germany
3. Department of Neurosurgery, University Hospital Geneva, Geneva, Switzerland
4. Department of Neurosurgery, University Hospital Freiburg, Freiburg, Germany
5. Department of Neurosurgery, Kantonsspital Aarau, Aarau, Switzerland
6. Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
7. Department of Neuropathology, Yale School of Medicine, New Haven, Connecticut