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Correlations between various proteins measured in the kidneys of rats exposed to frack sand dust (FSD) 8. The white bars represent correlations between proteins in air exposed rats and the black bars represent correlations between proteins in the FSD 8-exposed rats. Abbreviations: vascular endothelial growth factor (VEGF), osteopontin gene (OPN), kidney injury molecule-1 (KIM-1), glutathione-S-transferase (GST)-α, IFN-γ-induced 10 (IP-10).
