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. 2022 May 9;12:7603. doi: 10.1038/s41598-022-11607-9

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Geographic referral visualization. (A) Map of referring sites (red dots) to the neurosurgical center from across the U.K. between March, 2020 and October 2021. (B) Northern Greater London referral catchment area with referring sites (red circles) size proportional to referral volume. The five highest volume main referring sites are highlighted with black borders. ^†Denotes the approximate location of the receiving neurosurgical center.