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Publisher's Note: Error in Methods

Posted by PLOS_ONE_Group on 11 Oct 2011 at 23:16 GMT

of class
http://plosone.org/article/info:doi/10.1371/journal.pone.0023176#article1.body1.sec2.sec5.p3

Under the Methods subheading Data Analysis, the parenthesis should be replaced by "(For A=B, wAA is twice the total contact time between children of class A)"

No competing interests declared.