Määttä, Suvi http://orcid.org/0000-0001-9771-5720
Kaukonen, Riikka
Vepsäläinen, Henna
Lehto, Elviira
Ylönen, Anna
Ray, Carola
Erkkola, Maijaliisa
Roos, Eva
Funding for this research was provided by:
Samfundet Folkhälsan
Helsingin Yliopisto
Päivikki ja Sakari Sohlbergin Säätiö
Terveyden Tutkimuksen Toimikunta
Opetus- ja Kulttuuriministeriö
Medicinska Understödsföreningen Liv och Hälsa
Signe ja Ane Gyllenbergin Säätiö
Juho Vainion Säätiö
Etelä-Pohjanmaan Rahasto
Article History
Received: 9 May 2017
Accepted: 22 August 2017
First Online: 2 September 2017
Ethics approval and consent to participate
: Ethical approval was provided by the University of Helsinki ethical review board in humanities and social and behavioral sciences. A short letter with information about the study and the possibility to deny further participation was sent out to all invited parents.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.