1. Department of Neurosurgery, Hôpital du Valais, Centre Hospitalier du Valais Romand (CHVR), Hôpital de Sion, Sion, Switzerland
2. Department of Intensive Care Medicine, Hôpital du Valais, Centre Hospitalier du Valais Romand (CHVR), Hôpital de Sion, Sion, Switzerland
3. Department of Neurology, Hôpital du Valais, Centre Hospitalier du Valais Romand (CHVR), Hôpital de Sion, Sion, Switzerland
4. Department of Clinical Neurosciences, Neurosurgery Service and Gamma Knife Center, Lausanne University Hospital (CHUV), Lausanne, Switzerland
5. Faculty of Biology and Medicine (FBM), University of Lausanne (Unil), Lausanne, Switzerland
6. Signal Processing Laboratory (LTS 5), Ecole Polytechnique Fédérale de Lausanne, (EPFL), Lausanne, Switzerland
7. Unit of Neuroradiology, Service of Diagnostic and Intervention Radiology, Hôpital du Valais, Centre Hospitalier du Valais Romand (CHVR), Hôpital de Sion, Sion, Switzerland