1. Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
2. Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
3. Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
4. Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
5. Cognosco, Anexa Animal Health, Morrinsville, New Zealand