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. 2020 Jun 8;6(10):1178–1184. doi: 10.1016/j.eng.2020.05.013

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© 2020 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company.

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. 2 — Correlation between intestinal bacteria and clinical indexes in COVID-19 with pneumonia. (a) General patients; (b) severe patients; (c) critical patients. PT: prothrombin time; PTA: prothrombin activity; R: Pearson correlation coefficient.