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Spectra of maternal venous plasma. Principal Component Analysis (PCA, panel A) and Projection to Latent Structures for Discriminant Analysis (PLS-DA, panel B) scores plot for the spectra of maternal venous plasma showing the global metabolic differences between low birth weight (open circles) and control birth weight (black triangles ) newborns. Apparently, there are no global metabolic trends in the maternal blood associated with the weight of the newborns.
