Received: 27 March 2020
Accepted: 12 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: The study is approved by the Danish Data Protection Agency. According to Danish law at the time point of data collection, questionnaire and register-based studies did not need written informed consent nor approval by ethical or scientific committees [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.