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Authors
Melby, Paulina S.
Elsborg, Peter
Nielsen, Glen
Lima, Rodrigo A.
Bentsen, Peter
Andersen, Lars B.
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Article History
Received: 15 February 2021
Accepted: 17 June 2021
First Online: 2 August 2021
Declarations
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: In Denmark, only biomedical research and research projects that entail a risk for participants can receive a Trial Registration Number through ethics review by a Regional Ethics Board.The study obtained approval from the local ethics committee of the University of Copenhagen (reference KA00011gm). All procedures were carried out in accordance with relevant regulations and guidelines.Written information about the study was given to all school leaders, teachers and parents/legal guardians before the start of the study, and informed consent were obtained from the legal guardians of all participants.
: Not applicable.
: The authors declare that they have no competing interests.
