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. 2017 Jul 31;23(3):159–168. doi: 10.4258/hir.2017.23.3.159

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© 2017 The Korean Society of Medical Informatics

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Table 2. Definition of superclasses and their hierarchy.