,
Rypdal, Veronika http://orcid.org/0000-0003-3476-305X
Guzman, Jaime
Henrey, Andrew
Loughin, Thomas
Glerup, Mia
Arnstad, Ellen Dalen
Aalto, Kristiina
Rygg, Marite
Nielsen, Susan
Herlin, Troels
Fasth, Anders
Berntson, Lillemor
Rypdal, Martin
Nordal, Ellen
Funding for this research was provided by:
Helse Nord RHF
Article History
Received: 25 July 2019
Accepted: 8 November 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: Approval from medical research ethical committees and data protection authorities was granted according to the regulations of each participating country; in Norway, this was from the Regional Committee for Medical and Health Research Ethics NORD, number 53/96. Oral informed assent was obtained from all children. Written informed consent was obtained from parents of children aged < 16 years and from the children if aged ≥ 16 years of age.
: Not applicable.
: The authors declare that they have no competing interests.