Text and Data Mining valid from 2019-09-05
Received: 28 March 2019
Accepted: 27 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: This study was performed in accordance with the Helsinki Declaration and was approved by the Scientific Ethics Committee of the Capital Region, Denmark, protocols number HD2009–78 and H-6-2014-029, and by the Danish Data Protection Agency. All participants in the study gave their informed consent in writing.
: Not applicable
: The authors declare that they have no competing interests.