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Hierarchical clustering heatmap of significantly altered metabolites and the Pair-wise correlation (Spearman) analysis. Hierarchical clustering heatmap of the altered metabolites between the BEB and control groups under positive ionization mode (a), negative ionization mode (b), and combination mode(c). (d) Pair-wise correlation (Spearman) among between serum differential metabolites and clinical parameters. BEB: benign essential blepharospasm.
