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. 2021 Jan 15;141:155428. doi: 10.1016/j.cyto.2021.155428

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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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Fig. 3 — Correlation between interleukin-6 and (a) neutrophil-to-lymphocyte ratio, (b) lymphocyte count, (c) C-reactive protein and (d) procalcitonin in patients with COVID-19. The levels of interleukin-6 in COVID-19 patients with and without underlying disease: (e) diabetes and (f) hypertension. The Spearman rank correlation between IL6 and other inflammatory parameters is presented graphically in the form of scatter-plots, with a Local Regression Smoothing (LOESS) trend-lines for each association, r: Spearman’s rank correlation coefficient.