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. 2020 Sep 4;73(1):4–11.e2. doi: 10.1016/j.jvs.2020.08.118

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© 2020 by the Society for Vascular Surgery. Published by Elsevier Inc.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Supplementary Fig 1 (online only) — Vascular Activity Condition (VASCON) scale. Graduated scale that describes the capabilities of healthcare systems/hospital to provide surgical care when resources are limited.