“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)”, Swiss Med Wkly, vol. 151, no. 4344, p. Suppl. 254, Oct. 2021, doi: 10.4414/SMW.2021.w30095.