Minimal Standard Terminology of Digestive Endoscopy General Formal Ontology Source
http://purl.bioontology.org/ontology/STY/T051 http://www.onto-med.de/ontologies/gfo.owl#Event LOOM
http://purl.bioontology.org/ontology/STY/T071 http://www.onto-med.de/ontologies/gfo.owl#Entity LOOM