1. IBFM CNR - LATO; Cefalù Italy
2. Division of Catania; Italian National Institute of Nuclear Physics; Italy
3. Department of Physics and Astronomy; University of Catania; Catania Italy
4. University of Milano Bicocca; Milan Italy
5. Centre For Medical Radiation Physics; University of Wollongong; Wollongong Australia
6. San Gerardo Hospital; Monza Italy
7. Consorzio COMETA; Catania Italy
8. San Raffaele Scientific Institute; Milan Italy