1. Copenhagen Emergency Medical Services, Ballerup, Denmark
2. Prehospital Center, Region Zealand, Næstved, Denmark
3. Faculty of Clinical Medicine, Copenhagen University Hospital Rigshospitalet, University of Copenhagen, Copenhagen Ø, Denmark
4. Department of Neonatal and Paediatric Intensive Care, Copenhagen University Hospital, Denmark Rigshospitalet, Copenhagen, Denmark
5. Neurosurgical Department, Copenhagen University Hospital, Denmark Rigshospitalet, København Ø, Denmark
6. National Clinical Registries, RKKP, København Ø, Denmark