Naydenova, Emilia
Wesselinova, Diana
Staykova, Svetlana
Danalev, Dancho
Dzimbova, Tatyana
Funding for this research was provided by:
Bulgarian National Fund of Scientific Research at the Ministry of Education and Science (grant number DN 19/17, 20.12.2017.)
Article History
Received: 25 April 2019
Accepted: 28 June 2019
First Online: 26 July 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This article does not contain any studies with animals or humans performed by any of the authors.
: All authors are aware of the details of their research work that are published in the current paper and give their consent to their publication.