1. Medical Physics, Sant'Andrea Hospital, Rome, Italy.
2. Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, ENEA, Centro Ricerche Casaccia, Rome, Italy.
3. Nuclear Medicine, Sant'Andrea Hospital, Department of Translational Medicine, Faculty of Medicine and Psychology, “Sapienza” University of Rome, Rome, Italy.
4. Medical Physics, San Giovanni Calibita Hospital - Fatebenefratelli, Isola Tiberina, Rome, Italy.
5. Nuclear Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.