1 Department of Clinical Neurosciences, Service of Neurosurgery, Centre Hospitalier Universitaire Vaudois (CHUV), 46 rue du Bugnon, 1011, Lausanne, Switzerland.
2 Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
3 Department of Clinical Neurosciences, Service of Neurosurgery, Centre Hospitalier Universitaire Vaudois (CHUV), 46 rue du Bugnon, 1011, Lausanne, Switzerland. rodolfo.maduri@chuv.ch.
4 Service of Neurosurgery, GHU Paris-Sud, Bicêtre Hospital, Paris, France.
5 University Paris IX, Le-Kremlin-Bicêtre cedex, France.