1. Royal Free Hospital NHS Trust, London, UK
2. London School of Hygiene and Tropical Medicine, London, UK
3. UCL Centre for Clinical Microbiology, University College London, London, UK
4. National German Mycobacterium Reference, Borstel, Germany
5. Biomedical Research and Training Institute, Harare, Zimbabwe
6. University of California, San Francisco, USA
7. University of Cape Town, National Health Laboratory Service, Cape Town, South Africa
8. Public Health England, London, UK