HHEAR Value Sets Minimal Standard Terminology of Digestive Endoscopy Source
http://purl.obolibrary.org/obo/NCIT_C18020 http://purl.bioontology.org/ontology/MSTDE/MT140002 LOOM
http://purl.obolibrary.org/obo/NCIT_C18020 http://purl.bioontology.org/ontology/STY/T060 LOOM