1 Division of Nephrology, Department of Medicine, Columbia University Irving Medical Center, New York, New York.
2 Dipartimento di Medicina e Chirurgia, Università di Parma, Unità Operativa Nefrologia, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy.
3 Division of Pediatric Nephrology, Boston Children's Hospital, Boston, Massachusetts.
4 Nephrology Division, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
5 Division of Nephrology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina.
6 Section of Nephrology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy.
7 Department of Pediatric Nephrology, Bristol Renal and Royal Bristol Children Hospital, University of Bristol, Bristol, United Kingdom.
8 Divisione di Nefrologia, Dialisi e Trapianti di Rene, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy.
9 Actio Biosciences Inc., San Diego, California.
10 Centre for Genomics Research, Discovery Sciences, BioPharmaceuticals R D, AstraZeneca, Cambridge, United Kingdom.
11 Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina.
12 Section of Nephrology, Surgical, Medical and Dental Department of Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy.
13 Nephrology, Dialysis and Transplant Unit, University Hospital of Modena, Modena, Italy.
14 Division of Nephrology and Dialysis, Belcolle Hospital, Viterbo, Italy.
15 Unit of Nephrology, Department of Internal Medicine, Pavia University, Dialysis and Transplantation Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
16 Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, Genoa, Italy.
17 Nephrology, Dialysis and Transplantation Clinics, IRCCS Policlinico San Martino, Genova, Italy.
18 Department of Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan.
19 The Renal Pathology Laboratory of the Department of Pathology and Cell Biology, Columbia University, New York, New York.