Funding for this research was provided by:
Received: 19 July 2019
Accepted: 24 January 2020
First Online: 4 February 2020
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency and Danish Patient Safety Authority (3–3013-2380/1) in accordance with Helsinki Declaration. Consent to participate: Not applicable as per approval (retrospective study).
: Not applicable.
: The authors declare no competing interests.