1. Function Peri‐operative Medicine and Intensive Care Karolinska University Hospital Section for Anaesthesiology and Intensive Care Medicine Karolinska Institute StockholmSweden
2. Department of Physiology and Pharmacology Section for Anaesthesiology and Intensive Care Medicine Karolinska Institute StockholmSweden
3. Department of Sleep Medicine Aleris fysiologLab StockholmSweden
4. Department of Surgical and Perioperative Sciences, Surgery Umeå University Umeå Sweden