Department of Nephrology;
Dr Peset University Hospital;
46017 Valencia;
Spain;
Department of Medicine;
Universitat de València;
46005 Valencia;
Spain;
Department of Mathematics;
Universidad de Alicante;
San Vicente del Raspeig;
03690 Alicante;
Spain;
Department of Nephrology;
FundacióPuigvert;
080348 Barcelona;
Spain;
Department of Nephrology;
Hospital Uni-versitari de Lleida;
IRBlleida(Institut de Reserca Biomèdica de Lleida);
25198 Lleida;
Spain;
Department of Nephrology;
Hospital General Universitario de Ciudad Real;
13005 Ciudad Real;
Spain;
Department of Nephrology;
Hospital da Costa Burela;
7880 Lugo;
Spain;
Department of Nephrology;
Hospital Universitario Fundación Alcorcón;
28922 Madrid;
Spain;
Department of Nephrology;
Hospital Universitario de Beellvitge;
IDIBELL;
L'Hospitalet de Llobregat;
08907 Barcelona;
Spain;
Research Unit and Department of Nephrology;
University Hospital Nuestra Senora de Candelaria;
38010 Santa Cruz de Tenerife;
Spain;
Department of Medicine;
Universitat Autònoma de Barcelona;
08193 Barcelona;
Spain;
Vitamin D; Chronic kidney disease; Mortality; Renal progression; Hospitalization;