Heikkala, Eveliina http://orcid.org/0000-0001-7156-491X
Ala-Mursula, Leena
Taimela, Simo
Paananen, Markus
Vaaramo, Eeva
Auvinen, Juha
Karppinen, Jaro
Article History
Received: 9 April 2019
Accepted: 27 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The study was approved by the Ethics committee of the Northern Finland Hospital District (and conducted according to the Declaration of Helsinki). At the age of 15–16 years, the participants gave their informed written consent to use their data in the study. A written informed consent was also obtained from the parents regarding the use of their child’s data and their own data in the study. Consents from both the participants and their parents were required to be included in this study.
: Received from the Northern Finland Birth Cohort Data and Publication Committee.
: The authors declare that they have no competing interests.