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Publisher's Note: Additional Supporting Information File

Posted by PLOS_ONE_Group on 15 Sep 2011 at 22:43 GMT

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http://plosone.org/article/info:doi/10.1371/journal.pone.0010137#article1.body1.sec5.supplementary-material4.caption1.p1

Due to an error, some comments that were raised on the article during the review process were not available when the editorial decision was made. In response to the Editors’ request, the authors would like to provide a document as supplementary information about the scope and methodology of their study. The document can be viewed here: http://www.plosone.org/corrections/pone.0010137.s005.cn.pdf

No competing interests declared.