Radiation Oncology Structures Ontology	SNOMED CT	Source
http://purl.bioontology.org/ontology/SNOMEDCT/261074009	urn:absolute:RadiationOncologyStructuresOntology#External	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/245460006	urn:absolute:RadiationOncologyStructuresOntology#Mesorectum	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/1201745009	urn:absolute:RadiationOncologyStructuresOntology#InternalTargetVolume	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/732980001	urn:absolute:RadiationOncologyStructuresOntology#Applicator	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/228791009	urn:absolute:RadiationOncologyStructuresOntology#GrossTumorVolume	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/228793007	urn:absolute:RadiationOncologyStructuresOntology#PlanningTargetVolume	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/228792002	urn:absolute:RadiationOncologyStructuresOntology#ClinicalTargetVolume	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/408101000	urn:absolute:RadiationOncologyStructuresOntology#Applicator	LOOM