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. 2014 Sep 23;5(1):16. doi: 10.1186/1878-5085-5-16

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Copyright © 2014 Berliner et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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A portion of a simplified entity-relationship diagram for a relational database is shown displaying the 5th-order information entities relating to hepatocellular carcinoma.