UCN and Parkinson disease: Correlation analyses also support the recruitment of EWcp in PD, as EWcp/UCN1 content correlated both with the rotarod performance (Fig. 3R, Spearman’s ρ = − 0.70; p = 0.0001) and SNpc/TH cell counts (Fig. 3S, Spearman’s ρ = − 0.66; p = 0.004).