Response to editorial comments - Manuscript: Multicenter validation of the Kidney Failure Risk Equation (KFRE) in Spanish patients with advanced chronic kidney disease Marco Montomoli;

Multicenter validation of the Kidney Failure Risk Equation (KFRE) formula in Spanish patients with advanced chronic kidney disease Beatriz Escamilla-Cabrera; Marco Montomoli; Maria Kislikova; Verónica de la Espada; Alazne Olarte-García; Ana María García-Prieto; Sara Piqueras-Sánchez; Álvaro Álvarez López; Lucía Rodríguez-Gayo; Javier Centellas-Pérez; Hilda Villafuerte; Pedro Barrera Baena;

Risk factors for progression in patients with KDOQI stage 3 Chronic Kidney Disease (PROGRESER study) Alberto Martínez-Castelao; José Luis Górriz Teruel; Luis D¿Marco; Enrique Garrigós; Gema Fernández-Fresnedo; Eugenia Espinel Garuz; Secundino Cigarrán Guldris; Jesús Arteaga Coloma; Nicolas Roberto Robles Pérez-Monteoliva; José Rafael Esteban de la Rosa; Luis Javier Nieto Iglesias; Alberto Ortiz Arduán; Juan Francisco Navarro-González;