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Authors
Valchev, Dobril
Ribarova, Irina
Borisov, Boyan
Radovanov, Viden
Lyubomirova, Valentina
Kostova, Irina
Dimova, Galina
Karpuzova, Orhideya
Lazarova, Svetlana
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Article History
Received: 17 November 2023
Accepted: 29 December 2023
First Online: 10 January 2024
Declarations
: Ethics approval and consent to participateAll authors have read, understood, and have complied as applicable with the statement on “Ethical responsibilities of Authors” as found in the Instructions for Authors.
: Not applicable.
: The authors declare that they have no competing interests.
