1. Department of Radiological Sciences, Nuclear Medicine Unit, San Raffaele G.Giglio Institute, Contrada Pietrapollastra- Pisciotto, Cefalu, Italy
2. Vita-Salute San Raffaele University and Division of Neuroscience, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy
3. Pituitary Unit of the Department of Neurosurgery, San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Via Olgettina 60, 20132 Milano, Italy
4. Department of Radiotherapy, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy
5. Department of Neuroradiology, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy
6. Division of Neuroscience, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy
7. Department of Neurosurgery, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy
8. Department of Nuclear Medicine, San Raffaele Scientific Institute, Via Olgettina 60, 20132 Milano, Italy