1. Rigshospitalet, Copenhagen University Hospital; Juliane Marie Centre - Anaesthesia and Surgical Clinic Department 4013; Copenhagen Denmark
2. Rigshospitalet, Copenhagen University Hospital; Department of Paediatric and Obstetric Anaesthesia; Copenhagen Denmark
3. Department 7812, Rigshospitalet, Copenhagen University Hospital; Copenhagen Trial Unit, Centre for Clinical Intervention Research; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. Rigshospitalet; Department of Paediatric and Obstetric Anaesthesia; Blegdamsvej 9, Afsnit 3342, rum 52 Copenhagen Denmark
5. Herlev and Gentofte Hospital, University of Copenhagen; Cochrane Anaesthesia, Critical and Emergency Care Group; Herlev Ringvej Herlev Denmark 2730