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PCA for plasma spectra from patients showing acute grade 0–1 and acute grade 2+ toxicity. (A) Score plots are shown for patients showing acute grade 0–1 (blue) and acute grade 2+ toxicity (red). (B) PC-1 and PC-2 loading plots for regions 1000–1800 cm−1 and 2800–3100 cm−1. Covariance ellipses (95% confidence) are shown for each class.
