Quantification of free and protein bound uremic toxins in human serum by LC-MS/MS: Comparison of rapid equilibrium dialysis and ultrafiltration. Fabresse, Nicolas; Uteem, Imteyaz; Lamy, Elodie; Massy, Ziad; Larabi, Islam Amine; Alvarez, Jean-Claude. Clinica Chimica Acta; International Journal of Clinical Chemistry. 2020; 507: p.228-235. doi:10.1016/j.cca.2020.04.032Article