1 Nuclear Medicine Unit, Dipartimento di Diagnostica per Immagini e Radioterapia Oncologica, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
2 Nuclear Medicine, IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
3 Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy.
4 Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.