Figure 10.

Research areas A General search: Research areas evolution in 5 year steps B General search: Distribution of the Top 10 subject areas by number of published items in the Top 15 countries by number of published items C Public health search: Research areas evolution in 5 year steps D Public health search: Distribution of the Top 10 subject areas by number of published items in the Top 15 countries by number of published items.

Groneberg-Kloft et al. BMC Public Health 2013 13:541   doi:10.1186/1471-2458-13-541
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