Vertebrate Taxonomy Ontology	Radiology Lexicon	Source
http://purl.obolibrary.org/obo/VTO_0082155	http://www.radlex.org/RID/RID39177	LOOM
http://purl.obolibrary.org/obo/VTO_0020272	http://www.radlex.org/RID/RID4883	LOOM
http://purl.obolibrary.org/obo/VTO_0053692	http://www.radlex.org/RID/RID6529	LOOM
http://purl.obolibrary.org/obo/VTO_0011244	http://www.radlex.org/RID/RID7747	LOOM