Chen, Wei
Feng, Pengmian
Ding, Hui
Lin, Hao
Funding for this research was provided by:
Top Young Innovative Talents of Higher Learning Institutions of Hebei Province (BJ2014028)
Article History
Received: 24 July 2016
Accepted: 27 August 2016
First Online: 2 September 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.