Li, Yu
Li, Huien
Wang, Zhigang
Gao, Danyang
Xiao, Kun
Yan, Aihua
Funding for this research was provided by:
Hebei Province Natural Science Foundation—Youth Foundation (C2012204098)
Article History
Received: 13 April 2018
Accepted: 23 August 2018
First Online: 31 August 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interests.
: The datasets generated and analysed during the current study are available from the corresponding author on reasonable request.