[1] Wellcome Trust Sanger Inst, Cambridge, England
[2] Univ Liverpool, Dept Mol & Clin Pharmacol, Liverpool L69 3BX, Merseyside, England
[3] Royal Liverpool & Broadgreen Univ Hosp Natl Hlth, Liverpool, Merseyside, England
[4] Univ Liverpool, Liverpool L69 3BX, Merseyside, England
[5] London Sch Hyg & Trop Med, Dept Pathogen Mol Biol, London WC1, England
[6] Belfast Hlth & Social Trust, Belfast, Antrim, North Ireland
[7] Univ London Imperial Coll Sci Technol & Med, Dept Infect Dis & Immun, London, England
[8] Imperial Coll Healthcare NHS Trust, Dept Bacteriol, London, England
[9] Anaerob Reference Lab, Cardiff, S Glam, Wales
[10] Scottish Salmonella Shigella & Clostridium Diffic, Glasgow, Lanark, Scotland
[11] Hines VA Hosp, Hines, IL USA
[12] Yonsei Univ, Coll Med, Seoul, South Korea
[13] Singapore Gen Hosp, Dept Pathol, Singapore 0316, Singapore
[14] Natl Inst Infect Dis, Dept Bacteriol, Tokyo, Japan
[15] Univ Calgary, Dept Microbiol Immunol & Infect Dis, Calgary, AB, Canada
[16] Univ Exeter, Coll Life & Environm Sci, Exeter, Devon, England
[17] Univ Cambridge, Dept Med, Cambridge CB2 2QQ, England
[18] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[19] Hlth Protect Agcy, London, England
[20] Univ Western Australia, Sch Pathol & Lab Med, Crawley, WA, Australia
[21] Iowa State Univ, Dept Vet Microbiol & Prevent Med, Ames, IA USA
[22] Univ Leeds, Healthcare Associate Infect Res Grp, Leeds, W Yorkshire, England
[23] Leiden Univ, Med Ctr, Dept Expt Microbiol, Leiden, Netherlands
[24] Univ Birmingham, Sch Immun & Infect, Birmingham, W Midlands, England