1 Department of Anesthesiology and Intensive Care-Pediatrics, Odense University Hospital, Odense, Denmark2Department of Clinical Research-Anesthesiology, University of Southern Denmark, Odense.
2 Department of Anesthesia, Royal Aberdeen Children's Hospital, Aberdeen, Scotland.
3 Department of Anesthesia, University Children's Hospital, Zurich, Switzerland5Faculty of Medicine, University of Zurich, Zurich, Switzerland.