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http://journals.cambridge.org/action/displayAbstract?aid=431972
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C. L. TROTTER,
N. J. GAY
and W. J. EDMUNDS
(2006).
The natural history of meningococcal carriage and disease. Epidemiology and Infection, 134
,
pp 556-566
doi:10.1017/S0950268805005339