Table 1. Data sources used for measuring disease similarity.

Data source	Web sites for downloading (Date)
DO	http://disease-ontology.org/ (Jun 2016)
CTD	http://ctdbase.org/ (Jun 2016)
GeneRIF	http://www.ncbi.nlm.nih.gov/gene/about-generif (Jun 2016)
GAD	https://geneticassociationdb.nih.gov/(Jun 2016)
OMIM	http://www.omim.org/(Jun 2016)
GO & GOA	http://www.geneontology.org (Jun 2016)
HumanNet	http://www.functionalnet.org/humannet (Jun 2016)