Following publication of this article [1], the corresponding author informed the PLOS ONE Editors that he was not aware of the submission of the manuscript, which used a different email address to his, and he does not stand by the reported content of the article.The PLOS ONE Editors have been unable to obtain the original data or verify that the study was conducted as reported. In light of the concerns raised, the authors and PLOS ONE Editors are issuing a retraction of the article.QC, HW agreed with the retraction.