Article History
Received: 17 July 2018
Accepted: 3 October 2018
First Online: 15 November 2018
Ethics approval and consent to participate
: The study protocol was approved by the Zoetis Manufacturing & Research Spain S.L. Animal Welfare committee prior to the start of the experiment, and was reported to the competent authorities.
: Not applicable.
: The authors declare that they have no competing interests.
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