Qin, Zhen
Xu, Wei
Chen, Shuai
Chen, Jun
Qiu, Jing Fu http://orcid.org/0000-0002-7769-9601
Li, Chao Rui
Funding for this research was provided by:
National Natural Science Foundation of China (31071093)
the Science and Technology Planning Project of Yuzhong District of Chongqing City (20140119)
Article History
Received: 12 November 2017
Accepted: 22 February 2018
First Online: 24 April 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.