1. Department of Surgical and Perioperative Sciences Anaesthesiology and Intensive Care Medicine (Sundsvall) Umeå University Umeå Sweden
2. Department of Surgical and Perioperative Sciences Anaesthesiology and Intensive Care Medicine (Umeå) Umeå University Umeå Sweden
3. Department of Surgical and Perioperative Sciences Anaesthesiology and Intensive Care Medicine (Sunderbyn) Umeå University Umeå Sweden