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. 2014 Sep 24;9:213. doi: 10.1186/1748-717X-9-213

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© Lee et al.; licensee BioMed Central Ltd. 2014

This article is published under license to 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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Failure pattern. The numbers in the circles were the patient numbers of relevant failure patterns. The percentage of relevant failure patterns were shown in the parentheses.