Funding for this research was provided by:
Bundesministerium für Ernährung und Landwirtschaft (28-RZ-3-72.046)
Received: 18 September 2017
Accepted: 24 June 2018
First Online: 28 June 2018
: The pigs were kept in accordance with the Guidelines for Protection of Vertebrate Animals used for experimental and other Scientific Purposes, European Treaty Series, nos. 123 /170 (ExternalRef removed;ExternalRef removed). Study design and housing of the animals were approved by a local, independent committee on ethics (Commission for ethical estimation of animal research studies of the Lower Saxonian State Office for Consumer Protection and Food Safety; approval number: 33.12–42,502–04-15/1962).
: Not applicable.
: The authors declare that they have no competing interests.
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