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Scientific Reports 3, Article number: 1099 10.1038/srep01099 (2013); Published: January222013; Updated: February182013
The authors have noticed that the original version of this Article contained a typographical error in the spelling of the author Hoifung Poon which was incorrectly given as Hoifung Poong. Furthermore, the author Jeff Baxter was incorrectly listed as Scott Baxter. These changes have now been corrected in both the PDF and HTML versions of the Article.
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