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Publisher's Note: Affiliation addition

Posted by PLOS_ONE_Group on 18 Nov 2011 at 00:18 GMT

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http://plosone.org/article/info:doi/10.1371/journal.pone.0023583#article1.front1.article-meta1.abstract1.p1

Saad B. Omer is also affiliated with Emory University Rollins School of Public Health, Atlanta, Georgia, United States of America.

No competing interests declared.