Document is current

Article History

Received: 6 December 2018

Accepted: 12 March 2019

First Online: 5 April 2019

Ethics approval and consent to participate

: According to the Central Denmark Region Regional committee on Health Research Ethics no ethical approval was needed (j.nr.: 1–10–72-4-17).The study was approved by the Danish Data Protection Agency (j.nr.: 1–16–02-703-18) and the National Board of Health (j.nr.: 3–3013-2049/1).

: Not relevant.

: JKP, CB, LK and LR report no conflict of interests. KA and TPM have received funding from the Danish HEMS research foundation.

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