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Directional analysis of limit of stability. H&Y=Hoehn–Yahr stage, HC = healthy control, FW = forward, BW = backward, RT = right, LT = left, FW-RT = forward-right, FW = forward-left, BWRT = backward-right, BW-LT = backward-left. ∗p < 0.05, ∗∗p < 0.01.
