1. Department of Anesthesiology and Intensive Care Ålesund HospitalHelse Møre and Romsdal Health Trust Ålesund Norway
2. Department of Circulation and Medical Imaging Norwegian University of Science and Technology Trondheim Norway
3. Department of Global Public Health and Primary Care University of Bergen Bergen Norway
4. Department of Intensive Care Clinic of Anesthesia and Intensive Care St. Olavs Hospital Trondheim Norway
5. Department of Intensive Care, Anesthesia and Surgical Services Haukeland University Hospital Bergen Norway
6. Department of Clinical Medicine University of Bergen Bergen Norway