1. Department of Anaesthesia and Intensive Care New Children's Hospital University of Helsinki and Helsinki University Hospital Helsinki Finland
2. Paediatric Research Centre University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Department of Anaesthesiology Rigshospitalet Juliane Marie Centre Copenhagen Denmark
4. Department of Anaesthesia and Intensive Care Queen Silvia's Children's Hospital Sahlgrenska University Hospital Gothenburg Sweden
5. Department of Anaesthesiology Oslo University Hospital Oslo Norway
6. Department of Pediatric Anesthesia and Intensive Care Skåne University Hospital Lund Sweden