Funding for this research was provided by:
Academy of Finland (288435)
Text and Data Mining valid from 2018-05-21
Received: 18 January 2018
Accepted: 6 March 2018
First Online: 21 May 2018
Ethics approval and consent to participate
: Ethical clearance has been received for all subprojects of HelSLI from the ethical board of Helsinki University Hospital (approval reference number: § 248/2012). This clearance required an extensive written ethical evaluation by the principal investigator (M. Laasonen), which included a data management plan. Also, a research permit has been cleared by Helsinki University Hospital and the cities of Espoo, Helsinki, and Vantaa. A written consent to participate has been obtained from the parents.
: Not applicable.
: The authors declare that they have no competing interests.
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