Article History
Received: 14 March 2018
Revised: 22 August 2018
Accepted: 28 August 2018
First Online: 1 September 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures involving animal handling and treatment were approved by the Committee for Animal Use and Care of the Ministry of Agriculture of Mecklenburg-Vorpommern, Germany (Ref. Nr. 7221.3-2-011/16).