Funding for this research was provided by:
National Natural Science Foundation of China (51375317)
General Project for Scientific Research of Liaoning Provincial Education Department, China (L2014236)
Liaoning Province Science and Technology Innovation special plan (201506003)
Article History
Received: 30 October 2017
Accepted: 1 February 2018
First Online: 12 February 2018
Compliance with ethical standards
:
: The corresponding author Chunyu Wei and other co-authors have no conflict of interest. All authors and any other organizations or individuals have no conflicts of interest, too. All authors solemnly promise here. Chunyu Wei, Ke Zhang, Yue Cai, Zhan Wang, Wenda Yu.