Funding for this research was provided by:
Medical Research Council (MRJ0068151)
Text and Data Mining valid from 2018-06-19
Received: 9 January 2018
Revised: 18 April 2018
Accepted: 9 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: The study was conducted along the guidelines set by the Ethics and Welfare Committee at the Royal Veterinary College and under UK Home Office licence (no. PPL70/6105).
: The authors declare that they have no competing interests.
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