[1] Copenhagen Emergency Medical Services,Department of Clinical Medicine
[2] University of Copenhagen Denmark,Department of Paediatrics and Adolescent Medicine
[3] Paediatric Pulmonary Service,Department of Research and Development
[4] Prehospital Center Region Zealand,Department of Neonatal and Pediatric Intensive Care
[5] Emergency Medical Services,Departments of Cardiology
[6] Copenhagen University Hospital,Department of Public Health
[7] Rigshospitalet,Prehospital Research Unit, Department of Regional Health Research
[8] Nordsjaellands Hospital,CAMES
[9] University of Copenhagen,undefined
[10] University of Southern Denmark,undefined
[11] The National Clinical Registries,undefined
[12] National Registries,undefined
[13] Herlev Hospital,undefined