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OPLS-DA score plot of metabolite profiles derived from esophageal carcinoma and healthy controls with corresponding loading plot.A) Supervised OPLS-DA score plot. Two-component model based on 53 measured urinary metabolites. Esophageal cancers are represented by red triangles and blue circles depict controls. B) OPLS-DA loading plot of urinary metabolite profiles derived from esophageal carcinoma and healthy controls. OPLS-DA, orthogonal partial least squares discriminant analysis.
