Vertebrate Trait Ontology	Cell Ontology	Source
http://purl.obolibrary.org/obo/GO_0060079	http://purl.obolibrary.org/obo/VT_0002912	LOOM
http://purl.obolibrary.org/obo/GO_0001525	http://purl.obolibrary.org/obo/VT_0010299	LOOM
http://purl.obolibrary.org/obo/GO_0001570	http://purl.obolibrary.org/obo/VT_0010300	LOOM