1. Department of Anaesthesia, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
2. Department of Perioperative Medicine and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
3. Section for Anesthesiology and Intensive Care Medicine, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
4. Department of Anaesthesia, University College London Hospitals NHS Foundation Trust, London, UK