Received: 21 February 2019
Accepted: 7 July 2019
First Online: 17 July 2019
Ethics approval and consent to participate
: This study was approved by the Danish Data Protection Agency with overall registration number 2015-57-0008 and id number 16/44223. According to Danish law, an ethics review is not required for surveys. The study complies with the declaration of Helsinki. In the letter of introduction, it was emphasised that participation in the survey was voluntary. Thus, upon participation the respondent provided consent to participate in the survey.
: Not applicable.
: The authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.