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. 2016 Mar 24;11(3):e0151156. doi: 10.1371/journal.pone.0151156

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© 2016 Vivacqua et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — Salivary a-syn in patients with Parkinson’s disease (PD) and healthy subjects (HS). Each histogram corresponds to the mean concentration of α-syn_total (panel A), α-syn_olig (panel B) and the α-syn_total/α-syn_olig ratio (panel C) in the saliva of patients with PD (black histogram) and HS (white histogram). Vertical bars denote standard deviation. Asterisk denote significant differences. Scatter-plot (panel D) shows the negative correlation between α-syn_total and α-syn_olig in patients with PD.