Koshev, Yordan S. http://orcid.org/0000-0002-8170-2826
Petrov, Momchil M.
Nedyalkov, Nedko P. http://orcid.org/0000-0003-4586-3224
Raykov, Ivaylo A. http://orcid.org/0000-0003-2445-7710
Article History
Received: 2 April 2020
Revised: 20 August 2020
Accepted: 11 September 2020
First Online: 25 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: In this article, all applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All authors present statement specifying that appropriate permissions were received from the responsible authorities.
: All authors contributed to the study’s conception and design. Material preparation, data collection and analysis were performed by Yordan Koshev, Momchil Petrov, Nedko Nedyalkov and Ivaylo Raykov. The first draft of the manuscript was written by Yordan Koshev and all authors have commented on previous versions of the manuscript. All authors have read and approved the final manuscript.
: Not applicable.