1. Department of Public Health and Microbiology, University of Turin , Turin, Italy
2. Laboratory of Cell Biology, Department of Genetics, Biology and Biochemistry, University of Turin , Turin, Italy
3. Biocrystallography Center CNR, University Federico II , Naples, Italy
4. Institute G. Gaslini , Genoa, Italy
5. Department of Biochemistry, University of Genoa , Genoa, Italy
6. Department of Pediatrics, University of Brescia , Brescia, Italy
7. Institute of Internal Medicine, University of Turin , Turin, Italy
8. Department of Medical Science, A. Avogadro University of Eastern Piedmont , Novara, Italy