Dona Foster, Kyle Knox, A. S. Walker, D. T. Griffiths, Hazel Moore, Elizabeth Haworth, Timothy Peto, Angela B. Brueggemann, Derrick W. Crook, and on behalf of the Oxford Invasive Pneumococcal Surveillance Group
Invasive pneumococcal disease: epidemiology in children and adults prior to implementation of the conjugate vaccine in the Oxfordshire region, England
J. Med. Microbiol. 2008 57: 480-487.