Received: 30 July 2020
Accepted: 7 October 2020
First Online: 15 October 2020
Change Date: 17 December 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board (IRB) of the study coordinator center (Maggiore Hospital, Bologna, Italy, approval number: 273/2020/OSS/AUSLBO) and by each institutional review committee of the participating hospitals. Informed consent was waived for unconscious patients while it was acquired for conscious patients or after liberation from mechanical ventilation. The researchers analyzed anonymized individual data.
: Not applicable.
: The authors have no conflict of interest to declare.