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. 2018 Jun 28;38:42. doi: 10.1186/s40880-018-0311-2

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© The Author(s) 2018

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. 1 — Trends in colon and rectal cancer incidence among men and women by age group, 1983–2012. Rates are age-standardized to the 1966 world standard population. Scattered points are observed rates. Lines are fitted rates according to joinpoint regression, which allowed up to three joinpoints except for male rectal cancer in ages 20–49 years, with 0 joinpoints. Circles = colon cancer; triangles = rectal cancer