1. Institut Pasteur, National Reference Center for Corynebacteria of the diphtheriae complex, Paris, France
2. Institut Pasteur, Biodiversity and Epidemiology of Bacterial Pathogens, Paris, France
3. Respiratory and Vaccine Preventable Bacteria Reference Unit, National Infection Service, Public Health England, London, UK
4. Immunisation and Countermeasures Division, National Infection Service, Public Health England, London, UK