Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-06104-3, published online 11 August 2017

In this Article, Mingchun Ren was not correctly recognised as a corresponding author. For correspondence and requests for materials, please contact Xianping Ge (gexp@ffrc.cn) or Mingchun Ren (renmc@ffrc.cn).

This has been corrected in the PDF and HTML versions of the Article.