Recommendations of the Spanish Society of Nephrology for the management of mineral and bone metabolism disorders in patients with chronic kidney disease: 2021 (SEN-MM) José-Vicente Torregrosa; Jordi Bover; Mariano Rodríguez Portillo; Emilio González Parra; María Dolores Arenas; Francisco Caravaca; María-Luisa González Casaus; Alejandro Martín-Malo; Juan Francisco Navarro-González; Víctor Lorenzo; Pablo Molina; Minerva Rodríguez; Jorge Cannata Andia;

The `Phosphorus Week¿: involvement of Spanish nephrologists in the control of phosphorus blood levels Emilio Sánchez Álvarez; Marc Xipell; Anna Gallardo; Elena Astudillo; Jose-Vicente Torregrosa;

Perception of Spanish nephrologists on an old unsolved problem: Pruritus associated with chronic kidney disease (CKD-aP) Marian Goicoechea; María Dolores Arenas-Jimenez; Nuria Areste; Rosa Elena Perez-Morales; Vicens Esteve; Emilio Sanchez-Alvarez; Guillermo Alcalde Bezhold; Ana Blanco; Rafael Sanchez-Villanueva; Pablo Molina; Raquel Ojeda; Mario Prieto-Velasco; Juan Manuel Buades;