1. Nephrology Unit, V. Fazzi Hospital, Lecce, Italy
2. Nephrolgy Unit, ASL Toscana Centro, Prato, Italy
3. Nephrology Unit, Ragusa Hospital, Ragusa, Italy
4. Nephrology Unit, General Hospital, Acquaviva delle Fonti, Italy
5. Vascular Access Project Group of Italian Society of Nephrology, Rome, Italy
6. Nephrology Unit, Pescara Hospital, Pescara, Abruzzo, Italy
7. Nephrology Unit, Carpi Hospital, Carpi, Italy
8. Nephrology Unit, Trento Hospital, Trento, Italy
9. Nephrology Unit, Cinisello Balsamo Hospital, Cinisello Balsamo, Italy
10. Nephrology Unit, S. Giovanni Bosco Hospital, Torino, Italy
11. “L. Sacco” Department of Biomedical and Clinical Sciences, University of Milano, Milano, Italy
12. Sant’Anna School of Advanced Studies, Institute of Life Sciences, Pisa, Italy
13. Department of Clinical and Molecular Medicine, Nephrology Unit, Sant’Andrea Hospital, Universita of Rome La Sapienza, Rome, Italy
14. Nephrology Unit, S. Gavino Hospital, S. Gavino, Italy
15. Rome Catholic University, Rome, Italy