1. Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
2. Redes de Investigación Cooperativa Orientadas a Resultados en Salud (RICORS), RICORS2040 (Kidney Disease), 28040 Madrid, Spain
3. Bone and Mineral Research Unit, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain
4. Nephrology Service, Reina Sofia University Hospital, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), University of Córdoba, 14004 Córdoba, Spain