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Scientific Reports 6: Article number: 2606510.1038/srep26065; published online: May172016; updated: June102016.
The original HTML version of this Article contained typographical errors in the spelling of the author Lv-yun Zhu which was incorrectly given as Ling-yun Zhu.
In addition, Lv-yun Zhu was incorrectly listed as a corresponding author, rather than Ling-yun Zhu.
These errors have now been corrected.
