Beyond the cut-off: harmonizing kappa free light chain index using likelihood ratios improves the clinical interpretation in the diagnosis of multiple sclerosis - Oyaert, Matthijs; Nevejan, Louis; Dekeyser, Cathérine; De Kesel, Pieter; Cambron, Melissa; Vanopdenbosch, Ludo; Van Hijfte, Liesbeth; Laureys, Guy; Vercammen, Martine (Frontiers in Immunology, 2025)