1. Department of Anaesthesiology Division of Emergencies and Critical Care Rikshospitalet Medical Centre Oslo University Hospital Oslo Norway
2. Department of Research and Development Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
3. Department of Intensive Care Haukeland University Hospital Bergen Norway
4. Norwegian Intensive Care and Pandemic Registry Haukeland University Hospital Bergen Norway
5. Oslo Metropolitan University Oslo Norway
6. University of Bergen Bergen Norway
7. Intensive and Postoperative Unit Østfold Hospital Trust Grålum Norway
8. Faculty of Health and Welfare Østfold University College Halden Norway
9. Institute of Health and Society Faculty of Medicine University of Oslo Oslo Norway
10. Department of Intensive Care Stavanger University Hospital Stavanger Norway
11. Akershus University Hospital Lørenskog Norway
12. Lovisenberg Diaconal University College Oslo Norway