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Correction to: Scientific Reports 10.1038/s41598-017-17931-9, published online 14 December 2017
The original version of this Article contained a typographical error in the spelling of the author Shaofeng Wang, which was incorrectly given as Shafeng Wang. This has now been corrected in the PDF and HTML versions of the Article.
Sirui Yang, Email: siruiyang@163.com.
Shaofeng Wang, Email: shaofengwang@jlu.edu.cn.
