1. Department of Neurosurgery, “Riuniti” Hospital,
2. Department of Neurosurgery, University of Foggia,
3. Department of Neurosurgery, Faculty of Medicine and Surgery, University of Foggia, Foggia,
4. Department of Neurosurgery, Giovanni XXIII Hospital, Bari, Italy,
5. Department of Neurosurgery, Städtisches Klinikum Karlsruhe, Karlsruhe, Germany.