Fu, Lei http://orcid.org/0000-0002-4931-3118
Li, Shangda http://orcid.org/0000-0002-9844-7366
Cai, Zhihua
Ding, Yongzheng
Guo, Xiao-Qing
Zhou, Li-Peng
Yuan, Daqiang http://orcid.org/0000-0003-4627-072X
Sun, Qing-Fu http://orcid.org/0000-0002-6419-8904
Li, Gang http://orcid.org/0000-0001-5229-554X
Article History
Received: 16 October 2017
Accepted: 19 April 2018
First Online: 4 June 2018
Change Date: 29 April 2020
Change Type: Update
Change Details: In the originally published PDF version of this Article, corresponding author information was missing for author Gang Li. This includes an email address in the affiliations section on the first page, and a line instructing readers who to address ‘correspondence and requests for materials’ to, on the final page. These have now been updated.
Competing interests
: The authors declare no competing interests.