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CTD curation and integration paradigm. (a) Biocurators capture three types of data from the literature for chemicals (C), genes (G) and diseases (D): C–G interactions, G–D relationships and C–D relationships. These three relationships generate a chemical–gene–disease triad. (b) The integration of these three data sets enables users to infer novel connections between chemicals–diseases and genes–diseases (dashed arrow).
