Many genetic diseases have multiple aliases, and for a clinical feature,
there are many different disease names too.
All he information can be gotten from HPO. More details about HPO, please
see http://www.human-phenotype-ontology.org/.
The HPO files include phenotype_annotation.tab and diseases_to_genes,
which can be downloaded automatically.
However, the speed may depend on the network environment. So, we recommend to
make the files ready locally before the jobs using localPDB().