Editor Note to article entitled “Quantitative cistern effacement and reduced gray to white matter ratio for prognostication in early brain computed tomography of patients with cardiac arrest”

In this article, the authors omitted the ethical institution name of the board that provided approval and date that approval was obtained from the ethical statement in this publication, which is required under the policies of the journal. The authors confirm that ethical approval was obtained from the Institutional Review Board (IRB) of Dong-A University Hospital, for the research under the following reference number: DAUHIRB-16-079, dated April 27, 2016. The authors explain in their article that the retrospective data used was originally obtained from January 2019 to December 2022 which does not align with the ethical approval validity.