FIGURE 2. Duplication is a global activity.
From the following article:
Mounir Errami & Harold Garner
Nature 451, 397-399(24 January 2008)
doi:10.1038/451397a
The proportion of suspected duplicates in the Déjà vu database for each country was estimated (unpublished data) by assigning articles to countries based on the corresponding author's address. Also presented is each country's relative contribution to Medline estimated from 180,000 randomly selected Medline articles.
