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