1. Department of Nephrology Hospital Universitario Puerta del Mar Cádiz Spain
2. Department of Nephrology Hospital Clínico San Carlos Madrid Spain
3. Department of Nephrology Hospital Vall d´Hebron Barcelona Spain
4. Department of Nephrology Hospital Universitario Doce de Octubre Madrid Spain
5. Department of Nephrology Hospital Universitario La Paz Madrid Spain
6. Department of Nephrology Hospital Germans Trias i Pujol Barcelona Spain
7. Department of Nephrology Fundació Puigvert Barcelona Spain
8. Department of Nephrology Hospital Universitario Gregorio Marañón Madrid Spain
9. Department of Nephrology Hospital Universitario de Cruces Bilbao Spain
10. Department of Nephrology Hospital Virgen de las Nieves Granada Spain
11. Department of Nephrology Hospital Universitario Miguel Servet Zaragoza Spain
12. Department of Nephrology Hospital Universitario Bellvitge Barcelona Spain
13. Department of Nephrology Hospital Regional Universitario de MálagaUniversity of MálagaIBIMAREDinREN Málaga Spain
14. Department of Nephrology Hospital Universitario de Cabueñes Gijón Spain
15. Department of Nephrology Hospital del MarInstitute Mar for Medical ResearchREDinREN Barcelona Spain