1. Department of Nephrology, Hospital Universitario 12 de Octubre , Madrid , Spain
2. Research Institute Hospital Universitario 12 de Octubre , Madrid , Spain
3. Centro de Investigaciones Biológicas , Consejo Superior de Investigaciones Científicas, Centro de Investigación Biomédica en Red en Enfermedades Raras, Madrid , Spain
4. Department of Nephrology and Renal Transplantation, Hospital Clínic, Centro de Referencia en Enfermedad Glomerular Compleja del Sistema Nacional de Salud de España, Department of Medicine, University of Barcelona , Barcelona , Spain
5. Department of Nephrology, Hospital Universitario Reina Sofía , Córdoba, Spain
6. Department of Nephrology, Hospital Universitario A Coruña , A Coruña, Spain
7. Department of Nephrology, Hospital Universitario Dr Peset , Valencia , Spain
8. Department of Nephrology, Hospital Universitario Puerta de Hierro , Madrid , Spain
9. Department of Nephrology, Hospital Universitario Virgen del Rocío , Sevilla , Spain
10. Department of Nephrology, Hospital Universitario Dr Josep Trueta , Gerona, Spain
11. Department of Immunology, Complutense University , Madrid , Spain
12. Department of Medicine, Complutense University , Madrid , Spain