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. 2019 Mar 13;90(7):768–773. doi: 10.1136/jnnp-2018-320151

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Volcano plot of cerebrospinal fluid proximity extension assay biomarkers, highlighting significant markers that differentiated the atypical parkinsonian syndromes (APS) group from the Parkinson’s disease (PD) group. Markers to the right of 0 on the x-axis were higher in the APS group and markers to the left of 0 on the x-axis were higher in the PD group. The threshold for p value significance (<0.05) was set using the Benjamini-Hochberg correction method for multiple testing with a false discovery rate of 5%.