SP231HEMODIAFILTRATION WITH ULTRAFILTRATE REGENERATION (HFR-SUPRA) IS AN EFFECTIVE TECHNIQUE IN THE FREE LIGHT CHAINS REDUCTION IN MULTIPLE MYELOMA WITH ACUTE RENAL FAILURE. (13th June 2019) - Pendón-Ruiz De Mier, Mv; Ojeda, Raquel; Alvarez De Lara, M A; Navas-Romo, A; Alonso, C; Caballero-Villarraso, J; Aljama, P; Soriano, S; Rodriguez, Mariano; Martín-Malo, Alejandro