Hristova, Preslava M.
Marinova-Bulgaranova, Teodora V.
Strateva, Tanya V.
Trifonov, Stefan V.
Hitkova, Hristina Y.
Article History
Received: 24 May 2023
Accepted: 20 July 2023
First Online: 26 July 2023
Declarations
:
: The study was approved by the local ethics board of Medical University – Pleven. Data processing was anonymized and complied with local data protection legislation (No 512/2018) and with the European Directive on the Privacy of Data (95/46/EC).All subjects that participated of this study gave a written informed consent in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.