Yu, Chuanfei
Gao, Kai
Zhu, Lei
Wang, Wenbo
Wang, Lan
Zhang, Feng
Liu, Chunyu
Li, Meng
Wormald, Mark R.
Rudd, Pauline M.
Wang, Junzhi
Article History
Received: 9 March 2015
Accepted: 14 December 2015
First Online: 29 January 2016
Change Date: 30 June 2017
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has been fixed in the paper.
Change Date: 30 June 2017
Change Type: Erratum
Change Details: Scientific Reports 6: Article number: 20029; published online: 29 January 2016; updated: 30 June 2017. The original HTML version of this Article listed an incorrect volume number. This has now been corrected in the HTML version; the PDF version was correct at the time of publication.
Competing interests
: The authors declare no competing financial interests.