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. 2014 May 9;15:151. doi: 10.1186/1471-2474-15-151

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Copyright © 2014 Hung 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/2.0), 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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Kaplan-Meier survival curve. Five-year Kaplan-Meier estimates of cumulative probability of survival after hospital admission for hip fracture. Each vertical tick mark indicates a follow-up month in which patient censoring took place.