Text and Data Mining valid from 2018-05-10
Received: 18 April 2017
Accepted: 30 April 2018
First Online: 10 May 2018
Ethics approval and consent to participate
: The Regional Research Ethics Committee of Southern Denmark approved the study, and all recommendations regarding privacy and confidentiality from the Danish Data Protection Agency were followed (SDU: 16/101656). In line with national regulations participation was obtainment of informed consent and thereby a written consent.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.