Ask, Helga http://orcid.org/0000-0003-0149-5319
Handal, Marte
Hauge, Lars Johan
Reichborn-Kjennerud, Ted
Skurtveit, Svetlana
Funding for this research was provided by:
Norwegian Institute of Public Health
Article History
Received: 8 April 2019
Accepted: 3 October 2019
First Online: 22 October 2019
Compliance with ethical standards
:
: The authors declare that they have no potential conflicts of interest.