1. Royal (Dick) School of Veterinary Studies, Division of Veterinary Clinical Studies; The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre; Roslin Midlothian Scotland EH25 9RG
2. Tay Valley Veterinary Centre; Perth Scotland PH2 0PA
3. Purine Research Laboratory; GSTS; Pathology, St. Thomas’ Hospital London SE1 7EH