Planarian Phenotype Ontology	Radiation Oncology Structures Ontology	Source
urn:absolute:RadiationOncologyStructuresOntology#Esophagus	http://purl.obolibrary.org/obo/PLANA_0000062	LOOM
urn:absolute:RadiationOncologyStructuresOntology#Testis	http://purl.obolibrary.org/obo/PLANA_0000208	LOOM
urn:absolute:RadiationOncologyStructuresOntology#Optic_Chiasm	http://purl.obolibrary.org/obo/PLANA_0000459	LOOM