1. Department of Veterinary Tropical Diseases; University of Pretoria; Private Bag X04 Onderstepoort 0110 South Africa
2. Animal Health and Veterinary Laboratory Agency; Weybridge, New Haw Addlestone Surrey KT15 3NB Great Britain
3. Centre for Veterinary Epidemiology and Risk Analysis; UCD School of Veterinary Medicine; University College Dublin; Belfield Dublin 4 Ireland
4. Office of the Chief Veterinary Officer; Welsh Government Cathays Park Cardiff CF10 3NQ Great Britain
5. Veterinary Epidemiology Unit; Department of Agriculture and Rural Development; Dundonald House, Upper Newtownards Road Belfast BT4 3SB Northern Ireland UK
6. Animal Health and Veterinary Laboratories Agency; Tuberculosis Programme of the Department for Environment; Food and Rural Affairs, Nobel House London SW1P 3JR Great Britain
7. Veterinary and Science Team; Rural and Environmental Directorate; Scottish Government, Saughton House Broomhouse Drive Edinburgh EH11 3XD Great Britain
8. Department of Agriculture; Food and the Marine; Backweston, Celbridge Co. Kildare Ireland