Received: 3 June 2021
Accepted: 30 September 2021
First Online: 18 October 2021
: No formal ethical approval was needed, according to the Regional scientific ethical committee in the Capital Region of Denmark (j.nr.: 16029544). The study was approved by the Danish Patient Safety Authority (j.nr.: 3-3013-1917/1). Data were always handled secure and with confidentiality.
: Not relevant.
: TPM, AKE, TMK, KB, KA, LK, TMH, PAB, and CB reports no conflicts of interest. FL has received unrestricted research grants from the Laerdal Foundation for acute medicine and from the Danish foundation TrygFonden. The research center at the EMS Copenhagen receives an unrestricted grant from the Laerdal Foundation for Acute Medicine.