1. Department of Infectious Disease EpidemiologyImperial College London W2 1PG London UK
2. National Heart and Lung Institute, Imperial College London SW3 6LR London UK
3. Department of Medical Microbiology, Charing Cross HospitalImperial College Healthcare NHS Trust W6 8RF London UK
4. Broad Institute of MIT and Harvard 02142 Cambridge MA USA
5. The Centre for Genomic Pathogen Surveillance
Wellcome Trust Genome Campus
CB10 1SA Cambridgeshire UK