1. University of Insubria, Como, Italy
2. CNR-ITB, Milan, Italy
3. INFN sez. Milano Bicocca, Milan, Italy
4. Azienda Universitaria Ospedaliera "S. Luigi", Orbassano (TO), Italy
5. University of Pavia, Pavia, Italy
6. Azienda Ospedaliera S.Anna, Como, Italy
7. INFN sez. Trieste, Trieste, Italy
8. University of Trieste, Trieste, Italy
9. NFN sez. Torino, Italy