Matthias P Hilty1,2, Urs Hefti1,3, Hermann Brugger1,4, Pierre Bouzat1,5. 1. For the UIAA Medical Commission, University Hospital of Zurich, Zurich, Switzerland. 2. Institute of Intensive Care Medicine, University Hospital of Zurich, Zurich, Switzerland. 3. Swiss Sportclinic, Bern, Switzerland. 4. Institute of Mountain Emergency Medicine, EURAC Research, Bolzano, Italy. 5. Department of Anaesthesia and Intensive Care, Grenoble Alps Trauma Centre, Grenoble-Alpes University Hospital, Grenoble, France.