Funding for this research was provided by:
Stiftelsen Alma och K. A. Snellman Säätiö
Juho Vainion Säätiö
Received: 27 March 2020
Accepted: 5 August 2020
First Online: 11 August 2020
Ethics approval and consent to participate
: The Ethics Committee of the Northern Ostrobothnia Hospital District at Oulu University Hospital, Oulu, Finland evaluated and approved the study plan (decision number EETTMK 51/2013). Only children whose families gave their written informed consent were enrolled in the study.
: Not applicable.
: The authors declare that they have no competing interests.