Scientific Reports 7:1412; doi:10.1038/s41598-017-01456-2; Article published online 03 May 2017

The original PDF version of this Article contained an error in the order of corresponding authors:

“Correspondence and requests for materials should be addressed to D.W. (email: cruise00@126.com) or H.-P.L. (email: liw2013@126.com)”

now reads:

“Correspondence and requests for materials should be addressed to H.-P.L. (email: liw2013@126.com) or D.W. (email: cruise00@126.com)”.

This has been corrected in the PDF version of this Article; the HTML version was correct at the time of publication.