1. Department of Molecular Medicine and Oncology and Anatomical Pathology, Sapienza University of Rome, Rome, Italy.
2. Department of Radiological Sciences, Oncology and Anatomical Pathology, Sapienza University of Rome, Rome, Italy.
3. Department of Oncology and Hemato-oncology, University of Milan “Statale,” Milan, Italy.
4. Unit of Nuclear Medicine, Department of Medicine, Surgical and Experimental Science, University of Sassari, Sassari, Italy.