Funding for this research was provided by:
Received: 26 December 2019
Accepted: 26 May 2020
First Online: 10 June 2020
Ethics approval and consent to participate
: All participants gave informed consent. The study was approved by the National Board of Health, reference number 3–3013-1416/1/ and the National Data Protection Agency PVH-2015-004, I-Suite number: 04330. The National Ethics Committee was consulted, and approval was not deemed necessary H-15016323.
: Not applicable.
: The authors declare that they have no competing interests.