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Authors
Mertimo, Teija
Karppinen, Jaro
Niinimäki, Jaakko
Blanco, Roberto
Määttä, Juhani
Kankaanpää, Markku
Oura, Petteri
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Article History
Received: 10 January 2022
Accepted: 30 March 2022
First Online: 15 April 2022
Declarations
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: The study followed the principles of the Declaration of Helsinki and its later amendments. The study was approved by the Ethics Committee of the Northern Ostrobothnia Hospital District in Finland. Participation in the NFBC1966 was voluntary and each study participant granted their written informed consent. Personal identity information was encrypted and pseudonymized before the data were handed over to the researchers.
: Not applicable.
: The authors declare no conflict of interest.
