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. 2021 Nov 3;62(4):443–454. doi: 10.1016/j.jemermed.2021.10.046

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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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Outcomes of patients with COVID-19 and acute coronary syndrome (ACS) compared with controls. Cases were patients with COVID-19 who were diagnosed with ACS at emergency department (ED) presentation. Control group A includes patients with COVID-19 without ACS attending the ED during the same period (March 1–April 30, 2020). Control group B includes non–COVID-19 patients with a diagnosis of ACS during the same period (March 1–April 30, 2020) and also for the same period of the previous year (March 1–April 30, 2019). Numbers denote statistical significance (p < 0.05). The multivariate analysis was adjusted for all significant variables. CI = confidence interval; ICU = intensive care unit; OR = odds ratio.