1 Institute of Nuclear Medicine, Department of Bioimaging and Radiological Sciences, Catholic University of the Sacred Heart, Rome, Italy ; Institute of Nuclear Medicine, Catholic University of the Sacred Heart, Largo Gemelli, 8, 00168 Rome, Italy.
2 Institute of Nuclear Medicine, Department of Bioimaging and Radiological Sciences, Catholic University of the Sacred Heart, Rome, Italy.
3 School of Medicine, Catholic University of the Sacred Heart, Rome, Italy.
4 Department of Nuclear Medicine, University of Brescia, Brescia, Italy.