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Corrigendum

Posted by SeungUpKim on 30 Jul 2014 at 05:59 GMT

Some mistyping error was found in the enrollment duration. The corrected enrollent period was approximately 2 years since 2008, not "June 2010 and November 2011".
Since the aim of this study was to compare the diagnostic performance between two tools at a given point, this error does not affect the major results. So, according to the recommendation by the publications assistant of this journal, the corresponding author would like to notify this through "Comments".
Thank you.

No competing interests declared.