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. 2017 Dec 15;19:278. doi: 10.1186/s13075-017-1479-6

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© The Author(s). 2017

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 — Results of the search for cases of giant cell arteritis (GCA) in Bergen health area 1972–2012. n refers to numbers of excluded patients and N refers to the remaining cohort. ^aOf the 792 identified patients, 49 had a residential address in a municipality not primarily served by one of the study hospitals