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Authors
Olczak-Kowalczyk, Dorota
Studnicki, Marcin
Twetman, Svante
Turska-Szybka, Anna
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Funding
Funding for this research was provided by:
Ministry of Health (Contract: 11/1/2018/1210/494)
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Article History
Received: 12 June 2025
Accepted: 30 September 2025
First Online: 8 November 2025
Declaration
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: The research has been conducted in full accordance with ethical principles, and including the World Medical Association Declaration of Helsinki (version, 2008). The study protocol was reviewed and ethical clearance had been obtained before the study began. The Bioethics Committee of the Medical University of Warsaw authorised the present study (No KB185/2018).
: Statement Informed written consent was obtained from all the children’s parents or guardians participating in the study, in accordance with the World Medical Association’s Declaration of Helsinki.
: The authors declare no competing interests.
