Fig. 1.
Percentage of contributions of Arab countries to publications from Arab countries indexed in PubMed during 1998–2007 listed in descending order.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.