Efficacy in the reduction ratios of middle molecules with the use of medium cut-off dialyzers and reduced dialysate flows: a cohort study. - Castillo JC; Doria C; Cely J; Camargo D; Orozco V; Ducuara D; Vesga J; Sanabria M; Rivera A; Lindholm B; Rutherford P (Frontiers in medicine, 2025)