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Correction to: Scientific Reports 10.1038/s41598-018-33214-3, published online 11 October 2018
In the original version of this Article, Qinlian Hou and Linlin Liu were omitted as equally contributing authors.
This error has now been corrected in the HTML and PDF versions of the Article.
Hui Dong, Email: donghui@irm-cams.ac.cn.
Deguan Li, Email: lideguan@irm-cams.ac.cn.
