Hadler-Olsen, Elin
Wirsing, Anna Maria
Article History
Received: 29 March 2019
Revised: 5 April 2019
Accepted: 5 April 2019
First Online: 23 April 2019
Competing interests
: The authors declare no competing interests.
: All authors have read and approved the final version of this manuscript.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).