Holt, Tonje http://orcid.org/0000-0002-9057-4010
Helland, Maren Sand
Gustavson, Kristin
Cummings, Edward Mark
Ha, Anh
Røysamb, Espen
Funding for this research was provided by:
The Norwegian Directorate for Children, Youth and Family Affairs and the Research Council of Norway (250642)
Article History
First Online: 16 September 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The Regional Committees for Medical and Health Research Ethics “REC” in Norway approved the study (Protocol number: 2015/1374). Participation in the study was voluntary and both parents had to provide a written informed consent in order to let their children participate. The children were provided information about the study in a separate letter.