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Methods clarification

Posted by batniji on 24 May 2012 at 17:55 GMT

We used ordinary least squares regression with country fixed effects, clustered by country
http://plosmedicine.org/article/info:doi/10.1371/journal.pmed.1001214#article1.body1.sec3.p3

This should read: We used ordinary least squares regression, clustered by country [...]

No competing interests declared.