Gehring, Peter M. http://orcid.org/0000-0002-9236-2046
Parshall, Dan
Harriger, Leland
Stock, Chris
Xu, Guangyong
Li, Xiaobing
Luo, Haosu
Article History
Received: 20 December 2016
Accepted: 13 September 2017
First Online: 5 December 2017
Competing interests
: The authors declare no competing financial interests.