1. Caen University Hospital and Caen Normandy University Caen France
2. Department of Neurosurgery Caen University Hospital and Caen Normandy University Caen France
3. Department of Clinical Research and Biostatistics Caen University Hospital and Caen Normandy University Caen France
4. Department of Anaesthesiology and Intensive Care Caen University Hospital and Caen Normandy University Caen France