1. Nephrology and Dialysis Department, Regional Hospital of Siena - Italy
2. Institute of Anatomy, University of Siena - Italy
3. Sclavo Research Center, Siena - Italy
4. Institute of Biochemistry, University of Perugia - Italy
5. Institute of Evolutive Biology, University of Siena - Italy
6. Nephrology and Dialysis Department, Regional Hospital of Perugia - Italy