AUTHOR=Busani Stefano , Munari Elena , Taccone Fabio Silvio , Donati Abele , Girardis Massimo TITLE=Editorial: Putting the Spotlight on the Role of Oxygen in Critically-Ill Patients: From Basic Mechanisms to Clinical Effects JOURNAL=Frontiers in Medicine VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.859632 DOI=10.3389/fmed.2022.859632 ISSN=2296-858X