1. World Health Organization Neurotrauma Collaborating Centre and Department of Neurosurgery, M. Bufalini Hospital, Cesena, Italy
2. Division of Community Health Sciences, University of Edinburgh Medical School, Edinburgh, Scotland
3. Division of Neuroscience,Institute of Neurological Sciences, Glasgow, Scotland
4. Department of Neurosurgery, Erasmus Medical Centre, Rotterdam, The Netherlands
5. Department of Neurosurgery, University of Mississippi, Jackson, Mississippi
6. National Research Council, Messina, Italy
7. Neurosurgical Clinic, University of Messina, Messina, Italy