Affiliation: | 1. Institute of Neurosurgery, Catholic University School of Medicine, , Rome, 00100 Italy;2. Department of Neurosurgery, University Hospital Zurich, , Zurich, Switzerland;3. Institute of Applied Physic, Italian National Research Council, , Sesto Fiorentino, Florence, 50019 Italy;4. Faculty of Veterinary Medicine, University of Camerino, , Matelica, 62024 Italy |