1. Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
2. Dompé Farmaceutici SpA, L’Aquila, Italy
3. San Matteo Hospital, University of Pavia, Pavia, Italy
4. Department of Medical Biotechnologies, University of Siena, Siena, Italy
5. Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA 19122, USA