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. 2016 Jan 27;14:11. doi: 10.1186/s12916-016-0554-1

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© Medici et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 2 — Effects of age <50 years and <50 % cystic content on the absolute risk of nodule growth. Growth was calculated as the increase in volume between the baseline and first follow-up ultrasounds. Age analyses were corrected for follow-up time, cystic content and sex, and cystic content analyses were corrected for follow-up time, age and sex