1. Department of Intensive Care and Aarhus University Hospital, Aarhus, Denmark.
2. Department of Otorhinolaryngology, Aarhus University Hospital, Aarhus, Denmark.
3. Department of Anesthesiology, Regional Hospital West Jutland, Herning, Denmark.
4. Department of Intensive Care, Stavanger University Hospital, Stavanger, Norway.
5. Critical Care and Anesthesiology Research Group and Department of Clinical Medicine, Stavanager University Hospital, Stavanger, Norway.
6. Research Center for Emergency Medicine, Emergency Department and Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.
7. Department of Intensive Care, Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.