Funding for this research was provided by:
The A.P. Møller Foundation
The Grosserer L. F. Foghts Foundation
The Foundation of the 1870s
The Linex Foundation
Received: 21 August 2018
Accepted: 19 December 2018
First Online: 5 January 2019
Ethics approval and consent to participate
: All participants gave oral and written informed consent before participating. The study was approved by the Regional Scientific Ethical Committee (VEK 1–10–72-75-16).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.