1. Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Minnesota, 1352 Boyd Avenue, St. Paul, MN 55108, USA
2. Veterinary Teaching Hospital, College of Veterinary Medicine, University of Minnesota, St. Paul, MN 55108, USA
3. Phytopharm plc, Corpus Christi House, 9 West Street, Godmanchester, Huntingdon PE29 2HY, UK
4. EMStat Ltd, 191 Markfield Lane, Newtown Linford LE67 9PQ, UK