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. Author manuscript; available in PMC: 2018 Apr 3.

Published in final edited form as: Stud Health Technol Inform. 2017;245:925–929.

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This article is published online with Open Access by IOS Press and distributed under the terms of the Creative Commons Attribution Non-Commercial License 4.0 (CC BY-NC 4.0).

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Distribution of mapped versus unmapped concepts within top level subtrees of the Disease Ontology. Numbers indicate the actual number of concepts in each subtree.