Received: 6 May 2019
Accepted: 23 September 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Ethical approval for this analysis was obtained from the Ethics Committee of the French Society of Anesthesiology and Intensive Care (IRB number: 00010254-2018-194) which waived the need for written consent. The patients and/or next of kin were informed about the inclusion of their anonymized health data in the database, and none declined participation. Written informed consent was waived due to the observational nature of the study.
: Not applicable
: The authors declare that they have no competing interests.