[1] CDSC Thames, London W2 3QR, England
[2] City Hosp, NHS Trust, Hosp Infect Res Lab, Birmingham, W Midlands, England
[3] Royal Liverpool Univ Hosp, Liverpool, Merseyside, England
[4] Kings Coll London, Sch Med & Dent, London, England
[5] Cent Publ Hlth Lab, Lab Hosp Infect, London NW9 5HT, England
[6] Gen Hosp Kettering, Dept Microbiol, Kettering, England
[7] London Hosp, Coll Med, Dept Med Microbiol, London E1 1BB, England
[8] United Med & Dent Sch, Dept Microbiol, London, England
[9] Royal Gwent Hosp, Newport NPT 2VB, Gwent, Wales
[10] Lambeth Southwark & Lewisham Hlth Author, Dept Hlth Policy & Publ Hlth, London, England
[11] Univ Nottingham Hosp, Dept Microbiol, Nottingham NG7 2UH, England
[12] St James Hosp, Dept Clin Microbiol, Dublin 8, Ireland
[13] Unilabs, Clin Pathol, London, England
[14] Nottingham Hlth Author, Dept Publ Hlth, Nottingham, England