Received: 16 January 2020
Accepted: 2 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: The Regional Ethics Committee (REK 2017/2498) considered the study protocol and concluded that no ethical approval was required. The Privacy Ombudsman (NSD 58762) considered the project not to include personal information, thereby exempting the duty of notification according to the European Union (EU) General Data Protection Regulation (GDPR).
: Not applicable.
: The authors declare that they have no competing interests.