Little C L, Walsh S, Hucklesby L, Surman-Lee S, Pathak K, Hall Y, de Pinna E, Threlfall E J, Maund A, Chan C H
Health Protection Agency Centre for Infections, London, United Kingdom.
Euro Surveill. 2006 Nov 23;11(11):E061123.4. doi: 10.2807/esw.11.47.03086-en.