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Authors
Nikolova, Silviya Pavlova https://orcid.org/0000-0002-7325-0110
Small, Eusebius https://orcid.org/0000-0001-9027-3632
Velikova, Margarita Stefanova https://orcid.org/0000-0002-5544-4448
Ivanova, Mariya Aleksandrova https://orcid.org/0009-0004-6557-765X
Childress, Saltanat https://orcid.org/0000-0002-2864-2780
Laleva, Krasimira Svetoslavova https://orcid.org/0000-0002-3391-1447
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Article History
Received: 6 November 2025
Accepted: 20 January 2026
First Online: 30 January 2026
Declarations
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: Approved by the Ethics Committee of the Medical University of Varna (Protocol No. 74/3.05.2018). Written informed consent was obtained from all participants. All procedures involving human participants were conducted in accordance with the ethical standards of the institutional research committee and the 1964 Helsinki Declaration and its later amendments.
: Not applicable.
: The authors declare no competing interests.
