Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (NA)
Familjen Kamprads Stiftelse (NA)
Karolinska Institute
Article History
Received: 2 June 2020
Accepted: 7 March 2021
First Online: 19 March 2021
Declarations
:
: All parents provided written consent and the study obtained ethical approval (No. 2017/711–31/1) from the Regional Ethical Review Board in Stockholm.
: Not applicable.
: The authors declare that they have no competing interests.