1 Department of Neurosurgery, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium. ericvigneul@hotmail.com.
2 Laboratory of Neural Differentiation (NEDI), Animal Molecular and Cellular Biology Group, Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, Louvain-La-Neuve, Belgium. ericvigneul@hotmail.com.
3 Department of Neurology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.
4 Department of Radiology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.
5 Department of Neurosurgery, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.