[1] Catholic University of the Sacred Heart, Department of Nuclear Medicine, Largo A. Gemelli 8, I-00168 Roma, Italy
[2] Department of Endocrinology, Catholic University of the Sacred Heart, Rome, Italy
[3] Department of Nuclear Medicine, Cervello Hospital, Palermo, Italy
[4] Department of Endocrinology, Cervello Hospital, Palermo, Italy
[5] Department of Nuclear Medicine of the University, Bari, Italy
[6] Department of Pathology, Catholic University of the Sacred Heart, Rome, Italy