- E-mail for correspondenceBristol Veterinary School, University of Bristol, Langford House, Langford, Bristol BS40 5DU, UK;
- Received 15 January 2017
- Revision received 11 July 2017
- Accepted 24 July 2017
- Published in print 11 November 2017.
- Published online 10 November 2017.
- Published first 28 August 2017.
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