Chen, Peihong
Shen, Jiwei
Wang, Chaozhan
Wei, Yinmao
Funding for this research was provided by:
National Natural Science Foundation of China (21575114, 21775121, 21475104)
Industry Development Project by the Science and Technology Department of Shaanxi Province (2016GY-214)
Article History
Received: 9 November 2017
Accepted: 31 December 2017
First Online: 12 January 2018
Compliance with ethical standards
: The authors declare that they have no competing interests.