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. 2014 Nov 18;14:104. doi: 10.1186/1471-2253-14-104

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© Scott 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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Calibration curves for observed mortality, with 95% confidence intervals, showing poor fit of predicted mortality compared to observed mortality across all risk deciles. Perfect test shown by line of unity. A - POSSUM. B - P-POSSUM.