Type of inferred link and support for each link. Inferred link is number of currently non-linked node pairs analyzed in each category. Literature support means a PubMed search resulted in a published article that supports the link. Expression support means there is literature support for gene expression changes. Database support means that there is support for a link due to curation methodology or the link was added in later version of CTD. Anti-support means that literature specifically says this link is not real, and no support means that no evidence could be found for or against the link.