Angelova, Violina T. http://orcid.org/0000-0002-6415-7336
Pencheva, Tania
Vassilev, Nikolay
Simeonova, Rumyana
Momekov, Georgi
Valcheva, Violeta
Article History
Received: 21 October 2018
Accepted: 18 January 2019
First Online: 8 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were calculated.