1. Allington Farm, Porton Down, Salisbury, SP4 0JQ, New Zealand
2. Faculty of Veterinary Science, Massey University, Palmerston North, New Zealand
3. MRC Laboratory Animals Centre, Woodmansterne Road, Carshalton, SM5 4EF
4. Ministry of Agriculture, Fisheries and Food, Cop Lane, Penwortham, Preston, PR1 0SN
5. Central Veterinary Laboratories, New Haw, Weybridge, KT15 3NB
6. 7 Mary Vale, Godalming, GU7 1SW
7. Centre for Laboratory Animals, University of Edinburgh, The Bush, Milton Bridge, EH26 0PL
8. Department of Veterinary Pathology, Royal (Dick) School of Veterinary Studies, Field Station, Easter Bush, EH25 9RG