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. 2019 Jan 11;19:52. doi: 10.1186/s12889-018-6376-7

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© The Author(s). 2019

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 — Social network visualization of indicated information flows during the outbreak in region A. Circles and squares indicate healthcare professions, subsequently healthcare professions included as respondents and healthcare professions not included as respondents. The numbers in the circles and squares correspond with the numbers of healthcare professions in Table 2 (except for number 23, which represents the RIVM as institution). The colours indicate the healthcare institutions in which the healthcare professionals operate. The direction of the arrows visualizes the information flow as indicated by the sender of the arrow. Purple arrows visualize reciprocated information flows