1. Animal Heath and Veterinary Laboratories Agency, Weybridge, Surrey, United Kingdom (Diribe, North, Sawyer, La Ragione)
2. School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, United Kingdom (Diribe, Roberts, La Ragione, Fitzpatrick)
3. Fitzpatrick Referrals, Godalming, Surrey, United Kingdom (Fitzpatrick)