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Authors
Brendgen, Mara https://orcid.org/0000-0001-6780-8547
Vitaro, Frank
Ouellet-Morin, Isabelle
Dionne, Ginette
Boivin, Michel
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Funding
Funding for this research was provided by:
Social Sciences and Humanities Research Council of Canada (435-2014-1536)
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Article History
Accepted: 2 February 2021
First Online: 12 February 2021
Declarations
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: None of the authors declares any conflict of interest.
: All instruments and procedures were approved by the Ste Justine Hospital Research Center’s Ethics Committee.
: Active informed written consent from the twin families (parents and children) was obtained for each new wave of data collection as well as from their teachers, classmates and classmates’ parents, when applicable. Children younger than age 10 provided active informed verbal assent prior to each data collection.
