1 Department of Autoimmune Diseases, Reference Centre (CSUR) for Systemic Autoimmune Diseases of the Spanish Health System, Hospital Clínic de Barcelona, Barcelona, Catalonia, Spain.
2 Department of Nephrology and Renal Transplantation, Reference Center (CSUR) for Glomerular Complex Diseases of the Spanish Health System, Hospital Clínic de Barcelona, Barcelona, Catalonia 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain.
3 Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain; Department of Pathology-Reference Center (CSUR) for Glomerular Complex Diseases of the Spanish Health System, Hospital Clínic de Barcelona, Barcelona, Catalonia, Spain.
4 Department of Nephrology, Hospital Universitario Cruces, Barakaldo, Basque Country, Spain.
5 Department of Autoimmune Diseases, Reference Centre (CSUR) for Systemic Autoimmune Diseases of the Spanish Health System, Hospital Clínic de Barcelona, Barcelona, Catalonia, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain.
6 Department of Rheumatology, Hospital 12 de Octubre, Complutense University, Madrid, Spain.
7 Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain; Department of Rheumatology, Hospital Clínic de Barcelona, Barcelona, Catalonia, Spain.
8 Department of Nephrology, Hospital 12 de Octubre, Complutense University, Madrid, Spain.
9 Research Institute (imas12) Hospital Universitario 12 de Octubre, Complutense University, Madrid, Spain.
10 Department of Nephrology, Fundación Jimenez Diaz, Madrid, Spain.
11 Autoimmune Diseases Research Unit, Biocruces Bizkaia Health Research Institute, University of the Basque Country, Barakaldo, Spain.
12 Department of Rheumatology, Fundación Jimenez Diaz, Madrid, Spain.
13 Department of Medicine, Lupus and Vasculitis Clinic, Addenbrooke's Hospital, University of Cambridge, England, UK.
14 Department of Nephrology and Renal Transplantation, Reference Center (CSUR) for Glomerular Complex Diseases of the Spanish Health System, Hospital Clínic de Barcelona, Barcelona, Catalonia 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain. Electronic address: [email protected].