Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-37401-0, published online 28 January 2019

The original version of this Article contained a typographical error in the name of author Hui Gao, which was incorrectly given as Gao Hui. This has now been corrected in the PDF and HTML versions of the Article, and in the accompanying Supplementary Information file.