Tabakova, Vassilka
Article History
Received: 14 June 2020
Accepted: 4 August 2020
First Online: 22 August 2020
Compliance with ethical standards
:
: The author declares that she has no conflicts of interest.
: The study is a review paper and as such does not include Research involving human participants and/or animals.
: There was no involvement of human participants and no need to obtain informed consent.
: The authors declare that they have no competing of interests.