Figure 1.

Age distribution in each region from each data source. Age distribution in each region of the sample extracted from administrative databases (Admin), of the sample extracted from clinical data collected by GPs participating to the Health Search Database (GP) and of the sample participating to the National Health Survey (Surv).

Gini et al. BMC Public Health 2013 13:15   doi:10.1186/1471-2458-13-15
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