Zhang, Yong
Yang, Xiaomei
Geng, Donghong
Duan, Yingfei
Fu, Junke
Funding for this research was provided by:
the Fundamental Research Funds for the Central University of China (08143004)
the Funds for Science and Technology Project of Shaanxi Province of China (2014K11-02-03-07)
Article History
Received: 5 November 2017
Accepted: 4 February 2018
First Online: 24 May 2018
Ethics approval and consent to participate
: Not applicable
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.