Distribution of drug annotation (A) and disease annotation (B) in the new drug-disease associations of the CTD validation set. The x-axis represents the quantile of the MeSH term counts for the drugs (part A) and diseases (part B) in the CTD reference collection (part A). The histograms indicate that both drugs and diseases within the CTD reference collection are biased toward greater numbers of associated MeSH terms.
Cheung et al. BMC Medical Genomics 2013 6(Suppl 2):S3 doi:10.1186/1755-8794-6-S2-S3