Funding for this research was provided by:
Received: 9 April 2019
Accepted: 27 August 2019
First Online: 12 September 2019
Ethics approval and consent to participate
: The study was conducted in accordance with the declaration of Helsinki and registered in the Danish Data Protection Agency (j.nr. 2007-41-1197). The Regional Scientific Ethics Committee of Central Denmark waived the need of a ethic approval as the study only involved questionnaire data. Written informed consent was obtained from all participants.
: Not applicable
: The authors declare that they have no competing interests.