Figure 5.

Cooperations A General search: Evolution of international cooperation B General search: Distribution of the cooperation articles by the number of cooperating Countries C Public health search: Evolution of international cooperation D Public health search: Distribution of the cooperation articles by the number of cooperating Countries.

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