1. Department of Neurosurgery, Royal Victoria Infirmary;
2. Institute of Neurosciences and
3. Medical Toxicology Centre, University of Newcastle, Newcastle upon Tyne, United Kingdom;
4. Department of Neurological Surgery, Hôpital Gui de Chauliac; and
5. INSERM U1051, Institute of Neurosciences of Montpellier Hôpital Saint Eloi, CHU Montpellier, France