1. Department of Environment and Health Istituto Superiore di Sanità Rome Italy
2. National Centre for Drug Research and Evaluation Istituto Superiore di Sanità Rome Italy
3. ISOF Consiglio Nazionale delle Ricerche Bologna Italy
4. Center for Advanced Technologies Adam Mickiewicz University Poznan Poland
5. Institute of Nanoscience and Nanotechnology NCSR “Demokritos” Athens Greece
6. Istituto di Cristallografia Consiglio Nazionale delle Ricerche Monterotondo Italy