HHEAR Value Sets Biomedical Informatics Research Network Project Lexicon Source
http://purl.org/twc/HHEAR_00257 http://bioontology.org/projects/ontologies/birnlex#birnlex_681 LOOM
http://purl.org/twc/HHEAR_00257 http://bioontology.org/projects/ontologies/birnlex#birnlex_228 LOOM