Sang, Fuming
Liu, Jia
Zhang, Xue
Pan, Jianxin
Funding for this research was provided by:
Natural Science Foundation of China (21407035)
Shandong Provincial Natural Science Foundation (ZR2014BM021)
Technology and Development Program of Weihai (2014DXGJ15)
HIT-NSRIF (2011101)
Article History
Received: 1 January 2018
Accepted: 11 April 2018
First Online: 25 April 2018
Compliance with ethical standards
: We declare that we have no conflict of interest.