data for Fig.5: gene-fam-with-drug-target.txt
column 1: HGNC gene family ID or name
column 2: number of drug target genes (gene products) in the (HGNC) gene family
column 3: number of genes in the (HGNC) gene family (possibly including pseudogenes)
column 4: description of the (HGNC) gene famil
