Hadzhinikolova, Mariya
Zderic, Ivan
Ciric, Daniel
Barcik, Jan P.
Enchev, Dian
Baltov, Asen
Rusimov, Lyubomir
Varga, Peter
Stoffel, Karl
Richards, Geoff
Gueorguiev, Boyko
Rashkov, Mihail
Article History
Received: 21 August 2021
Accepted: 24 December 2021
First Online: 5 January 2022
Declarations
:
: Not applicable.
: Not applicable.
: The authors declare that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript