Boyadzhieva, Vladimira http://orcid.org/0000-0002-6780-5810
Tachkov, Konstantin http://orcid.org/0000-0002-3961-7556
Stoilov, Nikolay http://orcid.org/0000-0001-7183-086X
Mitov, Konstantin http://orcid.org/0000-0001-9483-9162
Stoilov, Rumen http://orcid.org/0000-0002-6340-9650
Petrova, Guenka http://orcid.org/0000-0001-8116-5138
Article History
Received: 14 February 2022
Accepted: 7 June 2022
First Online: 27 June 2022
Declarations
:
: The authors declare no conflict of interest.
: No part of the manuscript including the table and figure were published elsewhere.