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. 2020 Jun 23;55(1):139–140. doi: 10.1097/SHK.0000000000001603

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Copyright © 2020 by the Shock Society

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Fig. 1 — Hydrogen sulfide (H₂S) levels in serum of (A) healthy volunteers; (B) patients with ventilator associated pneumonia (VAP) by P aeruginosa; K pneumoniae; A baumannii; and (C) patients with pneumonia by the SARS-CoV-2 coronavirus on day 1 after hospital admission measured by monobromobimane derivatization assay followed by reverse phase HPLC separation. Comparison by the Mann–Whitney U test; ns indicates non-significant, ^∗P < 0.05, ^∗∗P < 0.01, ^∗∗∗P < 0.001, ^∗∗∗∗P < 0.0001.