[1] Univ Siena, Dept Med Surg & Neurosci, Unit Radiat Oncol, I-53100 Siena, Italy
[2] Univ Siena, Dept Med Surg & Neurosci, Unit Neurosurg, I-53100 Siena, Italy
[3] Univ Strasbourg, Neurosurg Dept, F-67000 Strasbourg, France
[4] Azienda Osped Univ Senese, Unit Neuroradiol, I-53100 Siena, Italy
[5] Sapienza Univ Rome, Dept Radiol Oncol & Pathol Sci, Radiat Oncol, Policlin Umberto1, I-00185 Rome, Italy
[6] Sapienza Univ Rome, Dept Neurosci, I-00185 Rome, Italy
[7] IRCSS Neuromed, I-86077 Pozzilli, Italy