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Figure 4 | BMC Infectious Diseases

Figure 4

From: Incidence of bacterial meningitis (2001–2005) in Lazio, Italy: the results of a integrated surveillance system

Figure 4

Cases of bacterial meningitis in Lazio, Italy, 2001–2005. Results of the record linkage of the four data sources: hospital surveillance of bacterial meningitis (HSS), laboratory information system (LIS), the mandatory infectious diseases notifications (NDS), and hospital information system (HIS). The largest set includes the undetected cases as estimated by the capture-recapture model.

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