1 Unit of Radiation Oncology, University Hospital of Siena, Siena, Italy; Istituto Toscano Tumori, Florence, Italy. Electronic address: v.nardone@hotmail.it.
2 Unit of Clinical Neurology and Neurometabolic Disorders, Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena, Italy.
3 Unit of Neuro Radiology, University Hospital of Siena, Siena, Italy.
4 Unit of Radiation Oncology, University Hospital of Siena, Siena, Italy; Istituto Toscano Tumori, Florence, Italy; Department of Biology, College of Science and Technology, Temple University, Philadelphia, PA United States.
5 Unit of Radiation Oncology, University Hospital of Siena, Siena, Italy; Istituto Toscano Tumori, Florence, Italy; Sbarro Health Research Organization, Temple University, Philadelphia, PA, United States.