1 Department of Nephrology and Renal Transplantation, Centro de Referencia en Enfermedad Glomerular Compleja del Sistema Nacional de Salud (CSUR), Hospital Clinic-Universitat de Barcelona, Barcelona, Spain. eguillen@clinic.cat.
2 Department of Nephrology and Renal Transplantation, Centro de Referencia en Enfermedad Glomerular Compleja del Sistema Nacional de Salud (CSUR), Hospital Clinic-Universitat de Barcelona, Barcelona, Spain.
3 Department of Internal Medicine, Hospital Angeles-Clinica Londres, Mexico City, Mexico.
4 Department of Hematology, Amyloidosis and Myeloma Unit, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.
5 Department of Hematology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.