1. Brain Center Rudolf Magnus, Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands
2. l’institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, France
3. Department of Neuroradiology, CHU Nantes, Nantes, France
4. Department of Neuroradiology, University Hospital of Saint-Etienne, Saint-Etienne, France
5. Department of Neuroradiology, Centre Hospitalier Sainte-Anne, Université Paris-Descartes, Paris, France
6. Department of Neurosurgery, KUH NeuroCenter, Kuopio University Hospital, Kuopio, Finland
7. Department of Neurosurgery, University of Eastern Finland, Kuopio, Finland