National Drug File - Reference Terminology	Vertebrate Homologous Organ Group Ontology	Source
http://purl.bioontology.org/ontology/NDFRT/N0000022939	http://purl.obolibrary.org/obo/VHOG_0000253	LOOM
http://purl.bioontology.org/ontology/NDFRT/N0000145839	http://purl.obolibrary.org/obo/VHOG_0000257	LOOM
http://purl.bioontology.org/ontology/NDFRT/N0000145808	http://purl.obolibrary.org/obo/VHOG_0000418	LOOM
http://purl.bioontology.org/ontology/STY/T025	http://purl.obolibrary.org/obo/VHOG_0001533	LOOM
http://purl.bioontology.org/ontology/STY/T017	http://purl.obolibrary.org/obo/VHOG_0001759	LOOM