Funding for this research was provided by:
Novartis Pharma (supported the database manager)
Received: 18 July 2019
Accepted: 23 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency, Denmark (12/26172) and the Regional Committees on Health Research Ethics for Southern Denmark, Denmark (S-20120203). All participants provided their written consent to participation.
: Written consent has been obtained from all participants for publication.
: The authors declare that they have no competing interests.