Text and Data Mining valid from 2018-06-22
Received: 26 September 2017
Revised: 12 April 2018
Accepted: 8 June 2018
First Online: 22 June 2018
Compliance with ethical standards
: Animal care and sample collection procedures followed the guidelines of the German Law of Animal Protection. The experimental protocol was approved by the Animal Care Committee of the Leibniz Institute for Farm Animal Biology (FBN). All relevant international, national, and/or institutional guidelines for the care and use of animals have been met.