Received: 24 July 2019
Accepted: 6 November 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency (No.: 11-11-2016) and the local Ethics Committee of the Capital Region (No.: H-16050540). Informed written consent was obtained from all informants after provision of both oral and written information in accordance with The Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.