“Supplementum 254: SwissAnaesthesia 2021, Abstracts of the joint annual congress of the Swiss Society for Anaesthesiology and Resuscitation and the Swiss Association of Nurse Anesthesists (Geneva, Switzerland, October 28−30, 2021)” (2021) Swiss Medical Weekly, 151(4344), p. Suppl. 254. doi:10.4414/SMW.2021.w30095.