Hristova, Preslava Mihaylova
Nankov, Vladislav Milkov
Hristov, Ivaylo Georgiev
Trifonov, Stefan Venelinov
Alexandrova, Alexandra Sashova
Hitkova, Hristina Yotova
Article History
Received: 14 December 2022
Accepted: 27 February 2023
First Online: 9 March 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 (№ 512/03.05.2018) and with the European Directive on the Privacy of Data (95/46/EC). All subjects that participated in this study gave a written informed consent in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.