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Authors
Serbic, Olivera
Andric, Zorana
Vojvodic, Svetlana
Djokic, Dragomir
Simic, Marija
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Article History
Received: 16 February 2025
Accepted: 10 July 2025
First Online: 23 July 2025
Declarations
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: The study was conducted in accordance with the Declaration of Helsinki. Written informed consent was obtained from parents or legal guardians after the study’s purpose and nature were explained to them. First, approval for the study was obtained from the Committee of Medical Faculty, University of Belgrade 2016 (N4/2846 2016) and then from the Ethical Committee at the Institute for Health Protection of Mother and Child of Serbia"Dr Vukan Cupic"for extension of the study (N8/188 2024).
: The authors declare no competing interests.
