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Publisher's Note: Error in Figure 4.

Posted by PLOS_ONE_Group on 01 Nov 2012 at 23:27 GMT

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http://plosone.org/article/info:doi/10.1371/journal.pone.0042494#pone-0042494-g004

A formatting error occurred in Figure 4 while preparing the manuscript for publication. The correct Figure 4 can be viewed here: http://www.plosone.org/corrections/pone.0042494.g004.cn.tif

No competing interests declared.