1. Department of Nuclear Medicine, Santa Maria Goretti Hospital, Latina, Italy
2. Section of Nuclear Medicine and Health Physics, Department of Medicine and Surgery, Università Degli Studi di Perugia, Piazza Lucio Severi 1, 06132 Perugia, Italy
3. Department of Radiological Sciences, Oncology and Anatomo-Pathology, Sapienza University of Rome, 00161 Rome, Italy
4. Unit of Nuclear Medicine, Department of Medical, Surgical and Experimental Sciences, University of Sassari, 07100 Sassari, Italy
5. Department of Biomedicine and Prevention, University Tor Vergata, Rome, Italy
6. IRCCS Neuromed, Pozzilli, Italy