1. Mycobacterium Reference Unit, Health Protection Agency, and Department of Microbiology, Guy's, King's and St Thomas' School of Medicine, King's College Hospital (Dulwich), East Dulwich Grove, London, SE22 8QF
2. Veterinary Laboratory Agency, Weybridge, New Haw, Surrey KT15 3NB
3. Scottish Mycobacteria Reference Laboratory, Royal Infirmary, Little France, Edinburgh EH16 4SA
4. HPA, Communicable Disease Surveillance Centre, Colindale, London NW9 5EQ, United Kingdom