Peral, V.; Vidau, P.; Herrera, J.; Rodriguez, C.; Tricas, L.; Tome, R.; Arroyo, F.; Peral V.; Department of Nephrology, Hospital General de Asturias; Vidau P.; Department of Nephrology, Hospital General de Asturias; Herrera J.; Department of Nephrology, Hospital General de Asturias; Rodriguez C.; Department of Nephrology, Hospital General de Asturias; Tricas L.; Department of Immunology, Hospital General de Asturias; Tome R.; Department of Nephrology, Hospital General de Asturias; Arroyo F.; Department of Internal Medicine, Hospital General de Asturias