Hristov, Milen http://orcid.org/0000-0002-6185-2157
Landzhov, Boycho
Nikolov, Rumen
Yakimova, Krassimira
Article History
Received: 22 July 2018
Accepted: 18 May 2019
First Online: 28 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.