1. 1 Department of Neurosurgery, University of Cincinnati, Cincinnati, OH 45219, USA
2. 2 Undersea Medicine Department, Naval Medical Research Centre, Silver Spring, MD 20910, USA
3. 3 Division of Neurosurgery, Virginia Commonwealth University, Richmond, VA 23298, USA
4. 4 Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
5. 5 Department of Clinical Neurophysiology, Glostrup Hospital, 2600 Glostrup, Denmark
6. 6 Centre for Stroke Research, Charité University Medicine, 10117 Berlin, Germany
7. 7 Department of Neurosurgery, University Medicine Mannheim, 68167 Mannheim, Germany
8. 8 Department of Clinical Neuroscience, King’s College London, London SE5 8AF, UK