1. Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine (Sunderbyn) Umeå University Umeå Sweden
2. Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine (Sundsvall) Umeå University Umeå Sweden
3. Department of Health Sciences Nursing Care Luleå University of Technology Luleå Sweden
4. Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine Umeå University Umeå Sweden