Clinical Performance of the Elecsys CSF pTau181/Aβ42 Ratio for Concordance with Tau-PET in Two Independent Cohorts

Smith R, Shaw L, Palmqvist S, Mattsson-Carlgren N, Klein G, Tonietto M; Alzheimer’s Disease Neuroimaging Initiative; Quijano-Rubio C, Rank CM, Andreadou M, Burnham SC, Stomrud E.