CSF collection and procedural protocols have been described previously [30 (link)]. Baseline CSF Aβ1-42, tau, and p-tau181 (pg/ml) were measured using the INNOBIA AlzBio3 immunoassay (Fujirebio, Belgium). The within-batch precision values were <10% (5.1–7.8% for Aβ1-42, 4.4–9.8% for tau and 5.1–8.8% for ptau181, respectively).
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