Ahola, Johanna http://orcid.org/0000-0003-0862-0274
Kokko, Katja http://orcid.org/0000-0002-8747-2080
Pulkkinen, Lea http://orcid.org/0000-0002-4290-6690
Kekäläinen, Tiia http://orcid.org/0000-0003-0160-727X
Funding for this research was provided by:
University of Jyväskylä
Article History
Received: 25 November 2022
Accepted: 12 June 2023
First Online: 19 June 2023
Declarations
:
: The study was performed in accordance with the Declaration of Helsinki. The initial study protocol in 1968 was approved by the local school authorities. The study protocol in 2001 was approved by the Ethical Committee of the Central Finland Health District (42/2000). The study protocol in 2020–2021 was approved by the Ethical Committee of the University of Jyväskylä (12/13/2019). Informed consent was also obtained from adult-aged participants at each measurement point.
: Not applicable.
: The authors declare no competing interests.