Lawn Stephen D, Planche Timothy, Riley Peter, Holwill Stephen, Silman Nigel, Bewley Kevin, Rice Philip, Wansbrough-Jones Mark H
Department of Infectious Diseases, St Georges Hospital Medical School, SW17 0RE, London, UK.
Lancet. 2003 May 3;361(9368):1518. doi: 10.1016/S0140-6736(03)13179-0.