1 Department of Clinical Neurosciences, Neurosurgery Service and Gamma Knife Center, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.
2 Faculty of Biology and Medicine (FBM), University of Lausanne (UNIL), Lausanne, Switzerland.
3 Assistance Publique, Hopitaux de Marseille, CHU Timone, Stereotactic and Functional Neurosurgery Service and Gamma Knife Unit, Marseille, France.
4 CHU Lille, Department of Neurosurgery and Neuro-oncology, Lille, France.