1. Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital—Amager and Hvidovre, Copenhagen, Denmark
2. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
3. Hans Christian Andersens Childrens Hospital, Odense University Hospital, Odense, Denmark
4. Department of Neonatology, Copenhagen University Hospital—Rigshospitalet, Copenhagen, Denmark
5. Emergency Medical Services Capital Region, Denmark
6. Department of Cardiology, Copenhagen University Hospital—Herlev and Gentofte, Copenhagen, Denmark
7. Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital—Rigshospitalet, Copenhagen, Denmark
8. Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital—Herlev and Gentofte, Copenhagen, Denmark
9. Falck Healthcare, Copenhagen, Denmark
10. National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark