Liu, Xue http://orcid.org/0000-0002-2104-9335
Liu, Yingying
Yang, Zaofeng
Ning, Wen http://orcid.org/0000-0002-7425-130X
Funding for this research was provided by:
National Natural Science Foundation of China (31471373, 31271559, 81430001)
Article History
Received: 5 February 2018
Accepted: 13 June 2018
First Online: 18 June 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.