1. Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital University of Bern Bern Switzerland
2. Department of Anaesthesiology and Intensive Care Medicine Spital Limmattal Schlieren Switzerland
3. Department of Intensive Care Medicine Kantonsspital Lucerne Lucerne Switzerland
4. Department of Intensive Care Medicine, Inselspital, Bern University Hospital University of Bern Bern Switzerland
5. Department of Cardiovascular Surgery, Inselspital, Bern University Hospital University of Bern Bern Switzerland