Article History
Received: 15 September 2019
Accepted: 19 January 2020
First Online: 24 February 2020
Ethics approval and consent to participate
: Not applicable
: Not applicable
: AR does not have any financial competing interests. RR and MC received lecture and consultant fees and refund on travel expenses form Air Liquide Santé International, a company interested in developing clinical applications for medical gases including xenon and argon. Mark Coburn and Rolf Rossaint are members of the Argon Organo-Protective Network (AON).