NEFL and Alzheimer disease: Analysis of the combination of some potential plasma biomarkers (p-tau181, t-tau, Aβ42, Aβ40, NfL, TDP-43, t-tau/Aβ42, and Aβ42/Aβ40 ratio) in AD by means of SIMOA revealed the range of normal and pathological plasma concentrations for each marker and the correlations of their plasma levels with the corresponding CSF levels ([69] and references therein).