1. Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa,
2. Department of Human Neurosciences, Neurosurgery, UOD Emergency Orthopaedic Traumatology, Sapienza University of Rome, Piazzale Aldo Moro, Roma,
3. Department of Neurosurgery, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy.