[1] University of Milano-Bicocca,Department of Medicine and Surgery
[2] University of Milano-Bicocca,Center of Biostatistics for Clinical Epidemiology, School of Medicine and Surgery
[3] San Gerardo Hospital,Nephrology Unit
[4] San Carlo Borromeo Hospital,Nephrology Unit
[5] Infermi Hospital,Nephrology Unit
[6] S. Uboldo Hospital,Nephrology Unit
[7] S. Maria Nuova Hospital,Nephrology Unit
[8] IRCCS Multimedica,Nephrology Unit
[9] Ospedali Riuniti,Nephrology Unit
[10] S. Anna Hospital,Nephrology Unit
[11] Bassini Hospital,Nephrology Unit
[12] S. Orsola-Malpighi Hospital,Nephrology Unit