[1] Freeman Rd Hosp, Dept Microbiol, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, England
[2] Queen Alexandra Hosp, Dept Microbiol, Portsmouth PO6 3LY, Hants, England
[3] Salford Royal Hosp, Dept Microbiol, Salford M6 8HD, Lancs, England
[4] City Hosp NHS Trust, Dept Med Microbiol, Birmingham B18 7QH, W Midlands, England
[5] Poole Hosp, Dept Microbiol, Poole BH15 2JB, Dorset, England
[6] Univ Dundee, Ninewells Hosp & Med Sch, Infect Unit, Dundee DD1 9SY, Scotland
[7] Dept Hlth, London SE1 8UG, England
[8] Royal Shrewsbury Hosp, Dept Microbiol, Shrewsbury SY3 8XQ, Salop, England