Pediatric out-of-hospital cardiac arrest in Denmark.

"Declarations Ethics approval and consent to participateThe study followed Danish General Data Protection Regulation and was registered and approved by the Danish Data Protection Agency (reference: 2007-58-0015, GEH-2014-019, I-suite 02737). As this is a registry-based study, ethical approval was not required per present Danish legislation. The protocol was registered at ClinicalTrials.gov (identifier: NCT04275856). Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding No funding was received."

"The study followed Danish General Data Protection Regulation and was registered and approved by the Danish Data Protection Agency (reference: 2007-58-0015, GEH-2014–019, I-suite 02,737). As this is a registry-based study, ethical approval was not required per present Danish legislation. The protocol was registered at ClinicalTrials.gov (identifier: NCT04275856). Declarations: Ethics approval and consent to participateThe study followed Danish General Data Protection Regulation and was registered and approved by the Danish Data Protection Agency (reference: 2007-58-0015, GEH-2014-019, I-suite 02737). As this is a registry-based study, ethical approval was not required per present Danish legislation. The protocol was registered at ClinicalTrials.gov (identifier: NCT04275856).: Consent for publicationNot applicable.: Competing interestsThe authors declare that they have no competing interests. Ethics approval and consent to participate: The study followed Danish General Data Protection Regulation and was registered and approved by the Danish Data Protection Agency (reference: 2007-58-0015, GEH-2014-019, I-suite 02737). As this is a registry-based study, ethical approval was not required per present Danish legislation. The protocol was registered at ClinicalTrials.gov (identifier: NCT04275856)."