http://www.owl-ontologies.com/NPOntology.owl#DOID_77
DOID:27
DOID:944
http://www.owl-ontologies.com/nullA184973
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http://www.owl-ontologies.com/nullA184977
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http://www.owl-ontologies.com/nullUA147
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http://www.owl-ontologies.com/nullA184980
gastrointestinal system disease
DOID_77
http://www.owl-ontologies.com/NPOntology.owl#DOID_7