Shopska, Maya http://orcid.org/0000-0002-9714-2464
Kolev, Hristo http://orcid.org/0000-0002-4231-9306
Aleksieva, Katerina http://orcid.org/0000-0002-0525-9674
Shtereva, Iskra
Tenchev, Krassimir
Todorova, Silviya http://orcid.org/0000-0003-2118-6994
Fabian, Martin http://orcid.org/0000-0002-8893-4195
Kadinov, Georgi http://orcid.org/0000-0001-8604-7704
Funding for this research was provided by:
Bulgarian National Science Fund (KP-06-H29-9/2018)
Article History
Received: 18 August 2021
Accepted: 4 September 2021
First Online: 11 September 2021
Declarations
:
: The authors have no conflicts of interest to declare that are relevant to the content of this article.
: Ethics approval was not required for this research.
: All authors have read and agreed to the published version of the manuscript.