1 Department of Anesthesiology and Intensive Care Medicine, Campus Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany. Electronic address: falk.von-dincklage@charite.de.
2 University of Western Australia, Perth, WA, Australia; Department of Anaesthesia and Pain Medicine, Royal Perth Hospital, Perth, WA, Australia. Electronic address: Thomas.ledowski@health.wa.gov.au.