1. Nephrology Department, Consorci Sanitari de Terrassa, 08227 Terrassa, Spain
2. Nephrology Department, Hospital Universitario Nuestra Señora de la Candelaria, 38010 Santa Cruz de Tenerife, Spain
3. Nephrology Department, Hospital Son Llatzer, Fundació Institut d’Investigació Sanitària Illes Balears, 07120 Palma, Spain
4. Healthcare Management Fundación Renal Iñigo Alvarez de Toledo, 28003 Madrid, Spain
5. Nephrology Department, Hospital Universitario Virgen de la Macarena, 41009 Sevilla, Spain
6. Nephrology Department, Hospital Universitario de Araba, 01004 Vitoria, Spain
7. Fresenius Medical Care, Dialysis Center Alcobendas, Complejo Hospitalario Ruber Juan Bravo, 28006 Madrid, Spain
8. Nephrology Department, Hospital de Cabueñes, 33394 Gijón, Spain
9. Nephrology Department, Hospital Universitario La Paz, 28046 Madrid, Spain
10. Nephrology Department, Fundación para el Fomento de la Investigación Sanitaria y Biomédica (FISABIO), Hospital Universitari Dr. Peset, Universitat de València, 46017 Valencia, Spain
11. Nephrology Department, Hospital Universitario Reina Sofia, 14004 Córdoba, Spain
12. Nephrology Department, Hospital Universitario de León, 24008 León, Spain
13. Nephrology Department, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain