Funding for this research was provided by:
Text and Data Mining valid from 2018-05-04
Received: 13 July 2017
Accepted: 20 April 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: The State Office for Consumer Protection and Food Safety, Dept. of Animal Welfare in accordance with the German and European animal welfare legislation approved this study under the number 12/1089.
: The authors declare that they have no competing interests.
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