Received: 12 August 2021
Accepted: 18 November 2021
First Online: 7 December 2021
: The local ethics committee of St. Gallen (EKOS) granted permission to use the anonymised patient data of all HEMS operations carried out within the requested period (EKOS St. Gallen 15.04.2021, BASEC Nr. 2021–00416 EKOS 21/064).
: Individual consent to use anonymized personal data was waived by the ethics committee (EKOS St. Gallen 15.04.2021, BASEC Nr. 2021–00416 EKOS 21/064).
: We declare no competing interests.