Sheppard Carmen L, Guiver Malcolm, Hartley John, Harrison Timothy G, George Robert C
Respiratory and Systemic Infection Laboratory, Health Protection Agency - Microbiology Services Division Colindale, 61 Colindale Avenue, London NW9 5EQ, UK.
Health Protection Agency North West, Manchester Laboratory, Manchester Medical Microbiology Partnership, PO Box 209, Clinical Sciences Buildings, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK.
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