1 Division of Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia , Italy.
2 Laboratory of Experimental Neurosurgery and Skull Base, Lariboisière Hospital, Assistance Publique-Hôpitaux de Paris, University of Paris-Cité, Paris , France.
3 Department of Neurosurgery, University Medical Center Utrecht, Utrecht , the Netherlands.
4 Department of Neurosurgery, Sapienza University of Rome, Rome , Italy.
5 Department of Neurosurgery, Lariboisière Hospital, Assistance Publique-Hôpitaux de Paris, University of Paris-Cité, Paris , France.