[This corrects the article DOI: 10.3389/fnins.2021.668852.].
Keywords: Alzheimer disease; S100A; antimicrobial peptides; cystatins; oxidative stress; salivary proteomics; thymosin β4; α-defensins.
Copyright © 2021 Contini, Olianas, Serrao, Deriu, Iavarone, Boroumand, Bizzarro, Lauria, Faa, Castagnola, Messana, Manconi, Masullo and Cabras.